[OpenStackClient] 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: I08ea720f6c06812cee87033190b2f3505c9b5f78

deliverables/rocky/cliff.yaml

@@ -19,6 +19,10 @@ releases:
       - hash: dd6abfffba239ff1be945dbd2b53a402d2757b46
         repo: openstack/cliff
     version: 2.13.0
+  - version: rocky-em
+    projects:
+      - repo: openstack/cliff
+        hash: dd6abfffba239ff1be945dbd2b53a402d2757b46
 branches:
   - location: 2.13.0
     name: stable/rocky

deliverables/rocky/osc-lib.yaml

@@ -19,6 +19,10 @@ releases:
       - hash: a66f37d09d49677bc774157a19bb3f0e9781a179
         repo: openstack/osc-lib
     version: 1.11.1
+  - version: rocky-em
+    projects:
+      - repo: openstack/osc-lib
+        hash: a66f37d09d49677bc774157a19bb3f0e9781a179
 branches:
   - location: 1.11.0
     name: stable/rocky

deliverables/rocky/python-openstackclient.yaml

@@ -25,6 +25,10 @@ releases:
       - repo: openstack/python-openstackclient
         hash: 3fe5d27a4df00280d00cc9041b99911b3d576eef
     version: 3.16.3
+  - version: rocky-em
+    projects:
+      - repo: openstack/python-openstackclient
+        hash: 3fe5d27a4df00280d00cc9041b99911b3d576eef
 branches:
   - location: 3.16.0
     name: stable/rocky