[swift] 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: Ibfa69db8835fb752cae29ff603c2cd82103b4b1f

deliverables/rocky/python-swiftclient.yaml

@@ -15,6 +15,10 @@ releases:
     projects:
       - repo: openstack/python-swiftclient
         hash: 9279603765cd7099fd180f4e13b1e8e1344d6f52
+  - version: rocky-em
+    projects:
+      - repo: openstack/python-swiftclient
+        hash: 9279603765cd7099fd180f4e13b1e8e1344d6f52
 branches:
   - name: stable/rocky
     location: 3.6.0

deliverables/rocky/swift.yaml

@@ -28,6 +28,10 @@ releases:
     projects:
       - repo: openstack/swift
         hash: 5aa4c5d88fec98cf4ca0536c511c61759e865ec9
+  - version: rocky-em
+    projects:
+      - repo: openstack/swift
+        hash: 5aa4c5d88fec98cf4ca0536c511c61759e865ec9
 cycle-highlights:
   - Added an S3 API compatibility layer, so clients can use S3 clients
     to talk to a Swift cluster.