[vitrage] Transition Stein to End of Life

As announced on mailing list [1], this patch transitions the Stein
branch to End of Life. The last patch of the branch will be tagged with
stein-eol tag. stable/stein branch cannot be used anymore and will be
deleted if this patch merges.

This is needed as stable/stein is not actively maintained in recent
period, thus gates are mostly broken due to job failures. Besides,
by removing these branches, infra resources will be freed up, too.

Please try to identify any zuul job, that is defined outside of the
repositories in this patch (for example in openstack-zuul-jobs, etc.)
and won't be used anymore if stable/stein is deleted. Propose a job
removal patch for them.

Please +1 if the team is ready for us to proceed with this transition,
or -1 if there are still some activity on the branch and the team wants
to continue to maintain it.

[1] https://lists.openstack.org/pipermail/openstack-discuss/2023-September/034965.html

Change-Id: I31fc63ceb1e7b6fce300916561ce72d17cb6ec15

deliverables/stein/python-vitrageclient.yaml

@@ -27,7 +27,12 @@ releases:
     projects:
       - repo: openstack/python-vitrageclient
         hash: 5d6673e343a47fc4cf90e53b2e6e9fa37d7f601c
+  - version: stein-eol
+    projects:
+      - repo: openstack/python-vitrageclient
+        hash: 84a7d05c77525ed5a38de5a8c88515a6960f5587
 branches:
   - location: 2.7.0
     name: stable/stein
-release-notes: https://docs.openstack.org/releasenotes/python-vitrageclient/stein.html
+release-notes:
+  https://docs.openstack.org/releasenotes/python-vitrageclient/stein.html

deliverables/stein/vitrage-dashboard.yaml

@@ -26,7 +26,12 @@ releases:
     projects:
       - repo: openstack/vitrage-dashboard
         hash: 1413c948c58174dfe58c7f80b93c1126a1466812
+  - version: stein-eol
+    projects:
+      - repo: openstack/vitrage-dashboard
+        hash: 07e7d7f954952836cc4020cff3c8d18b137f8a55
 branches:
   - location: 1.9.0
     name: stable/stein
-release-notes: https://docs.openstack.org/releasenotes/vitrage-dashboard/stein.html
+release-notes:
+  https://docs.openstack.org/releasenotes/vitrage-dashboard/stein.html

deliverables/stein/vitrage.yaml

@@ -34,6 +34,10 @@ releases:
     projects:
       - repo: openstack/vitrage
         hash: c3aaf5042f3ea33ddc66d093f63c3fe826f167ff
+  - version: stein-eol
+    projects:
+      - repo: openstack/vitrage
+        hash: fc1de82c6669318bafad6e7d9da7afc4d592a9b9
 branches:
   - location: 4.3.0
     name: stable/stein