[cloudkitty] 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: I2db793ce5dabc7888f5005ade4b9eccaf324a7e2

deliverables/stein/cloudkitty-dashboard.yaml

@@ -15,7 +15,12 @@ releases:
     projects:
       - repo: openstack/cloudkitty-dashboard
         hash: 5a5ff16f275b7875c9a251f90e6f22497b134852
+  - version: stein-eol
+    projects:
+      - repo: openstack/cloudkitty-dashboard
+        hash: a698ecd6bc864cc4c5d9d7656513ed2dba3a417b
 branches:
   - location: 8.1.0
     name: stable/stein
-release-notes: https://docs.openstack.org/releasenotes/cloudkitty-dashboard/stein.html
+release-notes: 
+  https://docs.openstack.org/releasenotes/cloudkitty-dashboard/stein.html

deliverables/stein/cloudkitty.yaml

@@ -28,6 +28,10 @@ releases:
     projects:
       - repo: openstack/cloudkitty
         hash: 9b53864dac0351f2b3869decca342d4bde521818
+  - version: stein-eol
+    projects:
+      - repo: openstack/cloudkitty
+        hash: 9b53864dac0351f2b3869decca342d4bde521818
 branches:
   - location: 9.0.0.0rc1
     name: stable/stein

deliverables/stein/python-cloudkittyclient.yaml

@@ -19,6 +19,10 @@ releases:
     projects:
       - repo: openstack/python-cloudkittyclient
         hash: 57d45638173f322b73876d4017e236ab7fc79e09
+  - version: stein-eol
+    projects:
+      - repo: openstack/python-cloudkittyclient
+        hash: 190249e68db5879d7e26b9dcddcc821f8de86671
 branches:
   - location: 2.1.0
     name: stable/stein