redhat: enable test_kmod, test_module and install kmod selftests

JIRA: https://issues.redhat.com/browse/RHEL-94012
Upstream Status: ARK commit 88311ff4b85b556cff60da81d1dbe095b2190b8e

commit 88311ff4b85b556cff60da81d1dbe095b2190b8e
Author: Herton R. Krzesinski <herton@redhat.com>
Date:   Fri Jun 6 12:20:59 2025 -0300

    redhat: enable test_kmod, test_module and install kmod selftests

    Tested: installed both -modules-internal and selftests-internal sub
            packages and run the kmod.sh selftest with an unloaded fs module
            chosen with DEFAULT_KMOD_FS variable, with the same kernel build
            booted. Tested on both rawhide and eln.

    To be able to test the module subsystem in the kernel, enable the
    modules used by kmod selftests. Given current filters, those enabled
    modules already land automatically within the modules-internal
    subpackage. Also, install the kmod selftest script used for testing.

    Signed-off-by: Herton R. Krzesinski <herton@redhat.com>

Conflicts:
- redhat/kernel.spec.template: 1 hunk modified

Assisted-by: Patchpal AI
Signed-off-by: Herton R. Krzesinski <herton@redhat.com>

Author: Herton R. Krzesinski

redhat/configs/common/generic/CONFIG_TEST_KMOD

@@ -1 +1 @@
-# CONFIG_TEST_KMOD is not set
+CONFIG_TEST_KMOD=m

redhat/configs/common/generic/CONFIG_TEST_LKM

@@ -1 +1 @@
-# CONFIG_TEST_LKM is not set
+CONFIG_TEST_LKM=m

redhat/kernel.spec.template

@@ -3254,7 +3254,7 @@ pushd tools/testing/selftests
 %undefine _fortify_level
 export CFLAGS="%{build_cflags}"
 
-TARGETS="bpf cgroup mm net net/forwarding net/mptcp net/netfilter net/packetdrill tc-testing memfd drivers/net/bonding iommu cachestat pid_namespace rlimits timens pidfd"
+TARGETS="bpf cgroup kmod mm net net/forwarding net/mptcp net/netfilter net/packetdrill tc-testing memfd drivers/net/bonding iommu cachestat pid_namespace rlimits timens pidfd"
 %{make} %{?_smp_mflags} EXTRA_CFLAGS="${RPM_OPT_FLAGS}" EXTRA_CXXFLAGS="${RPM_OPT_FLAGS}" EXTRA_LDFLAGS="%{__global_ldflags}" ARCH=$Arch V=1 TARGETS="$TARGETS" SKIP_TARGETS="" $force_targets VMLINUX_H="${RPM_VMLINUX_H}"
 
 # Restore the original level of source fortification