CI: Add pipelines for kernel-64k variant for RHEL

So we don't have to update CI immediately after RHEL branches from c9s.

Bugzilla: INTERNAL
Upstream Status: RHEL-only

Signed-off-by: Veronika Kabatova <vkabatov@redhat.com>

.gitlab-ci.yml

@@ -77,6 +77,10 @@ workflow: !reference [.workflow]
   variables:
     name: kernel-64k-c9s
 
+.64k_full_rhel9:
+  variables:
+    name: kernel-64k-rhel9
+
 .automotive_check_c9s_overrides:
   trigger:
     branch: c9s-automotive
@@ -151,6 +155,13 @@ rhel9_merge_request:
   extends: [.internal, .merge_request, .rhel_common, .with_notifications,
             .9-common, .trigger_rhel9_pipeline]
 
+rhel9_64k_merge_request:
+  # Don't add .rhel_common as we overwrite those configs
+  extends: [.internal, .merge_request, .with_notifications,
+            .9-common, .trigger_rhel9_pipeline,
+            .64k_common,
+            .64k_full_c9s]
+
 rhel9_realtime_check_merge_request:
   extends: [.internal, .merge_request,
             .9-common,
@@ -173,6 +184,13 @@ rhel9_merge_request_private:
   extends: [.scratch, .merge_request, .rhel_common,
             .9-common, .trigger_rhel9_pipeline]
 
+rhel9_64k_merge_request_private:
+  # Don't add .rhel_common as we overwrite those configs
+  extends: [.scratch, .merge_request,
+            .9-common, .trigger_rhel9_pipeline,
+            .64k_common,
+            .64k_full_c9s]
+
 rhel9_realtime_check_merge_request_private:
   extends: [.scratch, .merge_request,
             .9-common,