[magnum] Transition Wallaby to EM

This transition the wallaby 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.

The transition deadline is November 2nd, 2022.

Change-Id: I7e36e74de83d4a17f8f193f6a79e6ff14bda52ca

deliverables/wallaby/magnum-ui.yaml

@@ -19,6 +19,10 @@ releases:
     projects:
       - repo: openstack/magnum-ui
         hash: e523a37bde515954478c14bb9e510f5c53cbe981
+  - version: wallaby-em
+    projects:
+      - repo: openstack/magnum-ui
+        hash: e523a37bde515954478c14bb9e510f5c53cbe981
 branches:
   - name: stable/wallaby
     location: 8.0.0.0rc1

deliverables/wallaby/magnum.yaml

@@ -34,6 +34,10 @@ releases:
     projects:
       - repo: openstack/magnum
         hash: 5870994fcd51fc2695105968b708b862c4ae9d94
+  - version: wallaby-em
+    projects:
+      - repo: openstack/magnum
+        hash: 5870994fcd51fc2695105968b708b862c4ae9d94
 branches:
   - name: stable/wallaby
     location: 12.0.0.0rc1

deliverables/wallaby/python-magnumclient.yaml

@@ -19,6 +19,10 @@ releases:
     projects:
       - repo: openstack/python-magnumclient
         hash: 280acd2dff27d49d7606877edc3f17482f7444f6
+  - version: wallaby-em
+    projects:
+      - repo: openstack/python-magnumclient
+        hash: 280acd2dff27d49d7606877edc3f17482f7444f6
 branches:
   - name: stable/wallaby
     location: 3.4.0