[Telemetry] 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: I0f9b5c4dd1e90570802813291ea0f70c6e0683a1

deliverables/rocky/aodh.yaml

@@ -10,6 +10,10 @@ releases:
     projects:
       - repo: openstack/aodh
         hash: c723feffe0990892fc15774b2c817207b41006a8
+  - version: rocky-em
+    projects:
+      - repo: openstack/aodh
+        hash: c723feffe0990892fc15774b2c817207b41006a8
 branches:
   - name: stable/rocky
     location: 7.0.0

deliverables/rocky/ceilometer.yaml

@@ -18,6 +18,10 @@ releases:
     projects:
       - repo: openstack/ceilometer
         hash: af40e1bf360dbadb6e064c116c8bd5e58e650878
+  - version: rocky-em
+    projects:
+      - repo: openstack/ceilometer
+        hash: af40e1bf360dbadb6e064c116c8bd5e58e650878
 branches:
   - name: stable/rocky
     location: 11.0.0

deliverables/rocky/ceilometermiddleware.yaml

@@ -13,6 +13,10 @@ releases:
     version: 1.3.0
     flags:
       - forced
+  - version: rocky-em
+    projects:
+      - repo: openstack/ceilometermiddleware
+        hash: 8332b9eaff3a59026e7af1a7339525440a960d51
 branches:
   - location: 1.3.0
     name: stable/rocky