[Puppet OpenStack] 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: Ic19a582879cc019f41271c449cd8b130cd6b7b46

deliverables/rocky/puppet-tacker.yaml

@@ -22,6 +22,10 @@ releases:
       - hash: 25e85622f2bc41e75c48ba5044d0ce2e2ef70c05
         repo: openstack/puppet-tacker
     version: 13.3.1
+  - version: rocky-em
+    projects:
+      - repo: openstack/puppet-tacker
+        hash: 25e85622f2bc41e75c48ba5044d0ce2e2ef70c05
 branches:
   - location: 13.3.0
     name: stable/rocky