[vitrage] Transition 2023.1 Antelope to Unmaintained

This branch reached the end of its official stable maintained period,
hence this patch transition stable/2023.1 branch to Unmaintained. (For
details about Unmaintained state please see: [1][2])

The transitions is as follows:
- tip of the stable/2023.1 branch is tagged with 2023.1-eom tag
- unmaintained/2023.1 branch will be cut from 2023.1-eom tag
- stable/2023.1 branch will be deleted

Note:
- there will no longer be official releases off of 2023.1 branch after
  this transition
- backports can be pushed to unmaintained/2023.1 branch
- openstack-unmaintained-core (or <project>-unmaintained-core groups if
  such exists) have the rights to merge patches

Important: please +1 if the team is ready for us to proceed with this
transition, or -1 if there are any final 2023.1 Antelope stable release
with backports currently in flight that we should wait for. For the
latter case, please propose a final 2023.1 Antelope stable release
patch, and rebase this patch on top of that, with the latest commit
hash of stable/2023.1.

The planned transition deadline was October 30th, 2024 [3] last week,
so please approve this patch as soon as possible if the project is
ready for the transition.

[1] https://docs.openstack.org/project-team-guide/stable-branches.html#unmaintained
[2] https://governance.openstack.org/tc/resolutions/20230724-unmaintained-branches.html
[3] https://releases.openstack.org

Change-Id: I1ae7ca35ef4e29877683ce59cd46740003118ae6

deliverables/antelope/python-vitrageclient.yaml

@@ -11,7 +11,14 @@ releases:
     projects:
       - repo: openstack/python-vitrageclient
         hash: b6db5313e542a40edfa6c90c23157fe5e19a653b
+  - version: 2023.1-eom
+    projects:
+      - repo: openstack/python-vitrageclient
+        hash: 908de08ed3e515c7d01eeff8d9cb99476b4e71c9
 branches:
   - name: stable/2023.1
     location: 4.7.0
-release-notes: https://docs.openstack.org/releasenotes/python-vitrageclient/2023.1.html
+  - name: unmaintained/2023.1
+    location: 2023.1-eom
+release-notes:
+  https://docs.openstack.org/releasenotes/python-vitrageclient/2023.1.html

deliverables/antelope/vitrage-dashboard.yaml

@@ -15,7 +15,14 @@ releases:
       - repo: openstack/vitrage-dashboard
         hash: c5e6962e0088f54bcbe99ee18711053930af3f7e
     diff-start: 3.6.0
+  - version: 2023.1-eom
+    projects:
+      - repo: openstack/vitrage-dashboard
+        hash: c6201e8bf155c8df0507eda657de74554e29a32d
 branches:
   - name: stable/2023.1
     location: 4.0.0.0rc1
-release-notes: https://docs.openstack.org/releasenotes/vitrage-dashboard/2023.1.html
+  - name: unmaintained/2023.1
+    location: 2023.1-eom
+release-notes:
+  https://docs.openstack.org/releasenotes/vitrage-dashboard/2023.1.html

deliverables/antelope/vitrage.yaml

@@ -15,7 +15,13 @@ releases:
       - repo: openstack/vitrage
         hash: f3feec42643c21b664233264b213a471e0f795f7
     diff-start: 9.0.0
+  - version: 2023.1-eom
+    projects:
+      - repo: openstack/vitrage
+        hash: c0cbd11a8ddd069607ffc87ecda92bd3da403b61
 branches:
   - name: stable/2023.1
     location: 10.0.0.0rc1
+  - name: unmaintained/2023.1
+    location: 2023.1-eom
 release-notes: https://docs.openstack.org/releasenotes/vitrage/2023.1.html