[murano] Transition Rocky to EM

This transition the rocky branch to extended maintenance.
Changes for bugfixes and things the team deems important are
still encouraged, but there will no longer be official releases
off of the branch.

Please +1 if the team is ready for us to proceed with this
transition, or -1 if there are any final backports currently in
flight that we should wait for. For the latter case, please
update the patch with the new commit hash after doing a final
release to get those changes out so we know to proceed with the
transition.

Change-Id: If402daed32ea4ddf55a9b56e3af7dd5446d32a1c
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

deliverables/rocky/murano-agent.yaml

@@ -14,6 +14,10 @@ releases:
     projects:
       - repo: openstack/murano-agent
         hash: 08fda6ea42bf355bc087bf99883b588e80952d37
+  - version: rocky-em
+    projects:
+      - repo: openstack/murano-agent
+        hash: 08fda6ea42bf355bc087bf99883b588e80952d37
 branches:
   - name: stable/rocky
     location: 3.5.1