[glance] 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: I597132f63465e888a22889e4d7663a33f29d21aa

deliverables/rocky/glance-store.yaml

@@ -25,6 +25,10 @@ releases:
     projects:
       - repo: openstack/glance_store
         hash: 7cad6da6f1d4f7e8e47e6d1087d3905d3d806db6
+  - version: rocky-em
+    projects:
+      - repo: openstack/glance_store
+        hash: 7cad6da6f1d4f7e8e47e6d1087d3905d3d806db6
 branches:
   - name: stable/rocky
     location: 0.26.0

deliverables/rocky/glance.yaml

@@ -54,6 +54,10 @@ releases:
     projects:
       - repo: openstack/glance
         hash: ad39c12c64c8ff017918a8790d69d5278ac379da
+  - version: rocky-em
+    projects:
+      - repo: openstack/glance
+        hash: ad39c12c64c8ff017918a8790d69d5278ac379da
 repository-settings:
   openstack/glance: {}
 release-notes: https://docs.openstack.org/releasenotes/glance/rocky.html

deliverables/rocky/python-glanceclient.yaml

@@ -31,6 +31,10 @@ releases:
       - hash: 535bc526ce0196232b7f1f2df8ba6343b77b55b5
         repo: openstack/python-glanceclient
     version: 2.13.2
+  - version: rocky-em
+    projects:
+      - repo: openstack/python-glanceclient
+        hash: 535bc526ce0196232b7f1f2df8ba6343b77b55b5
 branches:
   - location: 2.12.0
     name: stable/rocky