Merge: redhat: conflict with unsupported shim versions

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/7568

JIRA: https://issues.redhat.com/browse/RHEL-126425

Make sure the kernel is not installed with an old shim version which
does not carry the appropriate CA certificate.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>

Approved-by: Jan Stancek <jstancek@redhat.com>
Approved-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: CKI GitLab Kmaint Pipeline Bot <26919896-cki-kmaint-pipeline-bot@users.noreply.gitlab.com>

Author: CKI KWF Bot

redhat/kernel.spec.template

@@ -975,6 +975,9 @@ Recommends: linux-firmware\
 Requires(preun): systemd >= 200\
 Conflicts: xfsprogs < 4.3.0-1\
 Conflicts: xorg-x11-drv-vmmouse < 13.0.99\
+%ifarch x86_64 aarch64\
+Conflicts: shim < 15.8-1\
+%endif\
 %{expand:%%{?kernel%{?1:_%{1}}_conflicts:Conflicts: %%{kernel%{?1:_%{1}}_conflicts}}}\
 %{expand:%%{?kernel%{?1:_%{1}}_obsoletes:Obsoletes: %%{kernel%{?1:_%{1}}_obsoletes}}}\
 %{expand:%%{?kernel%{?1:_%{1}}_provides:Provides: %%{kernel%{?1:_%{1}}_provides}}}\