RHAIENG-948: remove UBI 9 repository injection across all Dockerfiles (#3020)

```
+ dnf install -y perl mesa-libGL skopeo gcc gcc-c++ make openssl-devel autoconf automake libtool cmake python3-devel pybind11-devel openblas-devel unixODBC-devel
  Updating Subscription Management repositories.
  Red Hat Universal Base Image 9 (RPMs) - BaseOS  1.4 MB/s | 433 kB     00:00
  Red Hat Universal Base Image 9 (RPMs) - AppStre 6.4 MB/s | 2.2 MB     00:00
  Red Hat Universal Base Image 9 (RPMs) - CodeRea 683 kB/s | 174 kB     00:00
  Package mesa-libGL-24.2.8-3.el9_6.s390x is already installed.
  Package skopeo-2:1.20.0-1.el9.s390x is already installed.
  Package gcc-11.5.0-11.el9.s390x is already installed.
  Error:
     Problem: package mesa-dri-drivers-25.0.7-3.el9_7.s390x from ubi-9-appstream-rpms requires libLLVM.so.20.1()(64bit), but none of the providers can be installed
      - package mesa-dri-drivers-25.0.7-3.el9_7.s390x from ubi-9-appstream-rpms requires libLLVM.so.20.1(LLVM_20.1)(64bit), but none of the providers can be installed
      - cannot install both llvm-libs-20.1.8-3.el9.s390x from ubi-9-appstream-rpms and llvm-libs-19.1.7-2.el9.s390x from @System
      - package mesa-libGL-25.0.7-3.el9_7.s390x from ubi-9-appstream-rpms requires libgallium-25.0.7.so()(64bit), but none of the providers can be installed
...
```

Author: jiridanek

codeserver/ubi9-python-3.12/Dockerfile.cpu

@@ -3,9 +3,6 @@
 #########################
 ARG BASE_IMAGE
 
-# External image alias for UBI repository configuration
-FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
-
 ####################
 # rpm-base         #
 ####################
@@ -18,11 +15,6 @@ WORKDIR /root
 
 ENV HOME=/root
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ARG CODESERVER_SOURCE_CODE=codeserver/ubi9-python-3.12
 
 ARG NODE_VERSION=22.18.0
@@ -78,11 +70,6 @@ WORKDIR /opt/app-root/bin
 # OS Packages needs to be installed as root
 USER 0
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'

jupyter/datascience/ubi9-python-3.12/Dockerfile.cpu

@@ -3,9 +3,6 @@
 #########################
 ARG BASE_IMAGE
 
-# External image alias for UBI repository configuration
-FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
-
 ######################################################
 # mongocli-builder (build stage only, not published) #
 ######################################################
@@ -47,11 +44,6 @@ WORKDIR /opt/app-root/bin
 USER root
 ARG TARGETARCH
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'

jupyter/minimal/ubi9-python-3.12/Dockerfile.cpu

@@ -16,11 +16,6 @@ WORKDIR /opt/app-root/bin
 # OS Packages needs to be installed as root
 USER 0
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'

jupyter/minimal/ubi9-python-3.12/Dockerfile.cuda

@@ -5,9 +5,6 @@ ARG TARGETARCH
 #########################
 ARG BASE_IMAGE
 
-# External image alias for UBI repository configuration
-FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
-
 ####################
 # cuda-base        #
 ####################
@@ -18,11 +15,6 @@ WORKDIR /opt/app-root/bin
 # OS Packages needs to be installed as root
 USER 0
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'

jupyter/minimal/ubi9-python-3.12/Dockerfile.rocm

@@ -3,9 +3,6 @@
 #########################
 ARG BASE_IMAGE
 
-# External image alias for UBI repository configuration
-FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
-
 ####################
 # rocm-base        #
 ####################
@@ -16,11 +13,6 @@ WORKDIR /opt/app-root/bin
 # OS Packages needs to be installed as root
 USER 0
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'

jupyter/pytorch+llmcompressor/ubi9-python-3.12/Dockerfile.cuda

@@ -5,9 +5,6 @@ ARG TARGETARCH
 #########################
 ARG BASE_IMAGE
 
-# External image alias for UBI repository configuration
-FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
-
 ######################################################
 # mongocli-builder (build stage only, not published) #
 ######################################################
@@ -34,11 +31,6 @@ WORKDIR /opt/app-root/bin
 # OS Packages needs to be installed as root
 USER 0
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'

jupyter/pytorch/ubi9-python-3.12/Dockerfile.cuda

@@ -5,9 +5,6 @@ ARG TARGETARCH
 #########################
 ARG BASE_IMAGE
 
-# External image alias for UBI repository configuration
-FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
-
 ######################################################
 # mongocli-builder (build stage only, not published) #
 ######################################################
@@ -34,11 +31,6 @@ WORKDIR /opt/app-root/bin
 # OS Packages needs to be installed as root
 USER 0
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'

jupyter/rocm/pytorch/ubi9-python-3.12/Dockerfile.rocm

@@ -3,9 +3,6 @@
 #########################
 ARG BASE_IMAGE
 
-# External image alias for UBI repository configuration
-FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
-
 ######################################################
 # mongocli-builder (build stage only, not published) #
 ######################################################
@@ -32,11 +29,6 @@ WORKDIR /opt/app-root/bin
 # OS Packages needs to be installed as root
 USER 0
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'

jupyter/rocm/tensorflow/ubi9-python-3.12/Dockerfile.rocm

@@ -3,9 +3,6 @@
 #########################
 ARG BASE_IMAGE
 
-# External image alias for UBI repository configuration
-FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
-
 ######################################################
 # mongocli-builder (build stage only, not published) #
 ######################################################
@@ -32,11 +29,6 @@ WORKDIR /opt/app-root/bin
 # OS Packages needs to be installed as root
 USER 0
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'

jupyter/tensorflow/ubi9-python-3.12/Dockerfile.cuda

@@ -5,9 +5,6 @@ ARG TARGETARCH
 #########################
 ARG BASE_IMAGE
 
-# External image alias for UBI repository configuration
-FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
-
 ######################################################
 # mongocli-builder (build stage only, not published) #
 ######################################################
@@ -34,11 +31,6 @@ WORKDIR /opt/app-root/bin
 # OS Packages needs to be installed as root
 USER 0
 
-# Inject the official UBI 9 repository configuration into the AIPCC base image.
-# The Quay-based AIPCC image is "repo-less" by default (https://gitlab.com/redhat/rhel-ai/core/base-images/app#repositories), so dnf cannot upgrade or install packages.
-# By copying ubi.repo from the public UBI 9 image, we enable package management for upgrades and installations.
-COPY --from=ubi-repos /etc/yum.repos.d/ubi.repo /etc/yum.repos.d/ubi.repo
-
 ### BEGIN upgrade first to avoid fixable vulnerabilities
 # If we have a Red Hat subscription prepared, refresh it
 RUN /bin/bash <<'EOF'