[manila] Transition Train to EM

This transition the train 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: Iee71a4c958e2628452a51700b924e5b56518f0cb

deliverables/train/manila-ui.yaml

@@ -19,6 +19,10 @@ releases:
     projects:
       - repo: openstack/manila-ui
         hash: b1f62a005c61555205931985f6a871e57b2adcab
+  - version: train-em
+    projects:
+      - repo: openstack/manila-ui
+        hash: b1f62a005c61555205931985f6a871e57b2adcab
 branches:
   - location: 2.19.0
     name: stable/train

deliverables/train/manila.yaml

@@ -56,6 +56,10 @@ releases:
     projects:
       - repo: openstack/manila
         hash: 960e45bd255dafacef7c6f895aca9477fcd12d9b
+  - version: train-em
+    projects:
+      - repo: openstack/manila
+        hash: 960e45bd255dafacef7c6f895aca9477fcd12d9b
 branches:
   - name: stable/train
     location: 9.0.0.0rc1

deliverables/train/python-manilaclient.yaml

@@ -15,6 +15,10 @@ releases:
     projects:
       - repo: openstack/python-manilaclient
         hash: 1b2cafb008bee70242b68a03212bcc575df683b9
+  - version: train-em
+    projects:
+      - repo: openstack/python-manilaclient
+        hash: 1b2cafb008bee70242b68a03212bcc575df683b9
 branches:
   - location: 1.29.0
     name: stable/train