[magnum] 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: Ice56f0ddc9c5379be3bdef395b02213c777fe1cd

deliverables/rocky/magnum-ui.yaml

@@ -15,6 +15,10 @@ releases:
       - hash: c23a2d84f4f561adad65e49b0d960edd2fd82194
         repo: openstack/magnum-ui
     version: 5.0.1
+  - version: rocky-em
+    projects:
+      - repo: openstack/magnum-ui
+        hash: c23a2d84f4f561adad65e49b0d960edd2fd82194
 repository-settings:
   openstack/magnum-ui: {}
 release-notes: https://docs.openstack.org/releasenotes/magnum-ui/rocky.html

deliverables/rocky/magnum.yaml

@@ -26,6 +26,10 @@ releases:
     projects:
       - repo: openstack/magnum
         hash: 1df886df52ace162e88b064d4c3302908c2ba290
+  - version: rocky-em
+    projects:
+      - repo: openstack/magnum
+        hash: 1df886df52ace162e88b064d4c3302908c2ba290
 branches:
   - name: stable/rocky
     location: 7.0.0

deliverables/rocky/python-magnumclient.yaml

@@ -9,6 +9,10 @@ releases:
       - hash: 3e728f945f42e28c4f912c58a45c297d219e03bb
         repo: openstack/python-magnumclient
     version: 2.10.0
+  - version: rocky-em
+    projects:
+      - repo: openstack/python-magnumclient
+        hash: 3e728f945f42e28c4f912c58a45c297d219e03bb
 branches:
   - location: 2.10.0
     name: stable/rocky