[PowerVMStackers] 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: Ibddef4bfcc18a302fcc12302c37850f2b29d5cef

deliverables/rocky/ceilometer-powervm.yaml

@@ -28,5 +28,9 @@ releases:
       - repo: openstack/ceilometer-powervm
         hash: 1bd1f9e639f07b4f53be30ee887f9cced5d80d2a
     version: 7.0.0
+  - version: rocky-em
+    projects:
+      - repo: openstack/ceilometer-powervm
+        hash: 1bd1f9e639f07b4f53be30ee887f9cced5d80d2a
 repository-settings:
   openstack/ceilometer-powervm: {}

deliverables/rocky/networking-powervm.yaml

@@ -28,5 +28,9 @@ releases:
       - repo: openstack/networking-powervm
         hash: fad0075e7e65fb8388b8be343a4dc2cc82b0ba8a
     version: 7.0.0
+  - version: rocky-em
+    projects:
+      - repo: openstack/networking-powervm
+        hash: fad0075e7e65fb8388b8be343a4dc2cc82b0ba8a
 repository-settings:
   openstack/networking-powervm: {}

deliverables/rocky/nova-powervm.yaml

@@ -38,5 +38,9 @@ releases:
         hash: 984b122668161703eee33918d570c61ae9c5b1ca
         tarball-base: nova_powervm
     version: 7.0.0
+  - version: rocky-em
+    projects:
+      - repo: openstack/nova-powervm
+        hash: 984b122668161703eee33918d570c61ae9c5b1ca
 repository-settings:
   openstack/nova-powervm: {}