[kuryr] 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: I6ef268bd0b8fa88294cb3e514fa18f51121a99c2

deliverables/xena/kuryr-kubernetes.yaml

@@ -23,6 +23,10 @@ releases:
       - repo: openstack/kuryr-kubernetes
         hash: 1a120c23f6d753c5ea66b920cc1d5ac14e17bffe
     diff-start: 4.0.0
+  - version: xena-em
+    projects:
+      - repo: openstack/kuryr-kubernetes
+        hash: 1a120c23f6d753c5ea66b920cc1d5ac14e17bffe
 branches:
   - name: stable/xena
     location: 5.0.0.0rc1

deliverables/xena/kuryr-libnetwork.yaml

@@ -15,6 +15,10 @@ releases:
       - repo: openstack/kuryr-libnetwork
         hash: dbb7a4dff64326d547243ce092d5064a13bfabb0
     diff-start: 7.0.0
+  - version: xena-em
+    projects:
+      - repo: openstack/kuryr-libnetwork
+        hash: dbb7a4dff64326d547243ce092d5064a13bfabb0
 branches:
   - name: stable/xena
     location: 8.0.0.0rc1

deliverables/xena/kuryr.yaml

@@ -11,6 +11,10 @@ releases:
     projects:
       - repo: openstack/kuryr
         hash: 764de32607059a9a1a0bd37c46609815a1abe1ba
+  - version: xena-em
+    projects:
+      - repo: openstack/kuryr
+        hash: 764de32607059a9a1a0bd37c46609815a1abe1ba
 branches:
   - name: stable/xena
     location: 2.4.0