UPSTREAM: <carry>: Updating ose-csi-external-snapshotter-container image to be consistent with ART for 4.18

Reconciling with https://github.com/openshift/ocp-build-data/tree/827ab4ccce9cbbcf82c9dbaf6398b61d6cff8d7a/images/ose-csi-external-snapshotter.yml

Author: AOS Automation Release Team

.ci-operator.yaml

@@ -1,4 +1,4 @@
 build_root_image:
   name: release
   namespace: openshift
-  tag: rhel-9-release-golang-1.22-openshift-4.17
+  tag: rhel-9-release-golang-1.22-openshift-4.18

Dockerfile.openshift

@@ -1,8 +1,8 @@
-FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.22-openshift-4.17 AS builder
+FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.22-openshift-4.18 AS builder
 WORKDIR /go/src/github.com/kubernetes-csi/external-snapshotter
 COPY . .
 RUN make build
 
-FROM registry.ci.openshift.org/ocp/4.17:base-rhel9
+FROM registry.ci.openshift.org/ocp/4.18:base-rhel9
 COPY --from=builder /go/src/github.com/kubernetes-csi/external-snapshotter/bin/csi-snapshotter /usr/bin/
 ENTRYPOINT ["/usr/bin/csi-snapshotter"]