[zaqar] Transition Xena to EM

This transition the stable/xena 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 after the transition.

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.

The transition deadline is April 20th, 2023.

Change-Id: Id22cf51d8e7afbccb99809b92a7c94f4d9614c97

deliverables/xena/python-zaqarclient.yaml

@@ -11,6 +11,10 @@ releases:
     projects:
       - repo: openstack/python-zaqarclient
         hash: e388947aae2c1440ffc8c635d9dc2f702dc2cb27
+  - version: xena-em
+    projects:
+      - repo: openstack/python-zaqarclient
+        hash: e388947aae2c1440ffc8c635d9dc2f702dc2cb27
 branches:
   - name: stable/xena
     location: 2.2.0

deliverables/xena/zaqar-ui.yaml

@@ -16,6 +16,10 @@ releases:
       - repo: openstack/zaqar-ui
         hash: 98d0021d8affbf124b451fc182bb96de327c63fe
     diff-start: 10.0.0
+  - version: xena-em
+    projects:
+      - repo: openstack/zaqar-ui
+        hash: 98d0021d8affbf124b451fc182bb96de327c63fe
 branches:
   - name: stable/xena
     location: 11.0.0.0rc1

deliverables/xena/zaqar.yaml

@@ -15,6 +15,10 @@ releases:
       - repo: openstack/zaqar
         hash: c7d9976e1527eba5ca59a503b08e5d785d2b6101
     diff-start: 12.0.0
+  - version: xena-em
+    projects:
+      - repo: openstack/zaqar
+        hash: c7d9976e1527eba5ca59a503b08e5d785d2b6101
 branches:
   - name: stable/xena
     location: 13.0.0.0rc1