[kuryr] Transition Stein to EM

This transition the stein 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: Idb12c8407be1acdffc4e2b14e70a54d0dabd9ce7

deliverables/stein/kuryr-kubernetes.yaml

@@ -20,6 +20,10 @@ releases:
     projects:
       - repo: openstack/kuryr-kubernetes
         hash: cb0ff6c7ff7a850b623c4690da56af3257a53812
+  - version: stein-em
+    projects:
+      - repo: openstack/kuryr-kubernetes
+        hash: cb0ff6c7ff7a850b623c4690da56af3257a53812
 branches:
   - location: 1.0.0
     name: stable/stein

deliverables/stein/kuryr-libnetwork.yaml

@@ -12,6 +12,10 @@ releases:
     projects:
       - repo: openstack/kuryr-libnetwork
         hash: f43ba07c783f291133b32dee0277d8e5035e3e8c
+  - version: stein-em
+    projects:
+      - repo: openstack/kuryr-libnetwork
+        hash: f43ba07c783f291133b32dee0277d8e5035e3e8c
 repository-settings:
   openstack/kuryr-libnetwork: {}
 branches:

deliverables/stein/kuryr.yaml

@@ -8,6 +8,10 @@ releases:
     projects:
       - repo: openstack/kuryr
         hash: b3df2c6b5cfae0cfb692a2d9152b5ee84b5dd2b3
+  - version: stein-em
+    projects:
+      - repo: openstack/kuryr
+        hash: b3df2c6b5cfae0cfb692a2d9152b5ee84b5dd2b3
 repository-settings:
   openstack/kuryr:
     tarball-base: kuryr-lib