[OpenStackSDK] 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: Iaeb6435e109fe9a57818455201f68163c71eee21

deliverables/antelope/cliff.yaml

@@ -15,6 +15,12 @@ releases:
     projects:
       - repo: openstack/cliff
         hash: fb9a3a9b2daa21317d0adceca86215c393e975e6
+  - version: 2023.1-eom
+    projects:
+      - repo: openstack/cliff
+        hash: c138787c0b5a30b48bd75e3fd61585d29c9d8949
 branches:
   - name: stable/2023.1
     location: 4.2.0
+  - name: unmaintained/2023.1
+    location: 2023.1-eom

deliverables/antelope/openstacksdk.yaml

@@ -27,7 +27,13 @@ releases:
     projects:
       - repo: openstack/openstacksdk
         hash: eee309c588b173fcea383b3837ad44f3d18160ef
+  - version: 2023.1-eom
+    projects:
+      - repo: openstack/openstacksdk
+        hash: eee309c588b173fcea383b3837ad44f3d18160ef
 branches:
   - name: stable/2023.1
     location: 1.0.1
+  - name: unmaintained/2023.1
+    location: 2023.1-eom
 release-notes: https://docs.openstack.org/releasenotes/openstacksdk/2023.1.html

deliverables/antelope/osc-lib.yaml

@@ -11,7 +11,13 @@ releases:
     projects:
       - repo: openstack/osc-lib
         hash: 58ff270a9c54c591e743092f0002997ba5b62b79
+  - version: 2023.1-eom
+    projects:
+      - repo: openstack/osc-lib
+        hash: 1f33f2dd09033f5be76dc29ed38c4b0ed3d065b3
 branches:
   - name: stable/2023.1
     location: 2.7.0
+  - name: unmaintained/2023.1
+    location: 2023.1-eom
 release-notes: https://docs.openstack.org/releasenotes/osc-lib/2023.1.html

deliverables/antelope/python-openstackclient.yaml

@@ -19,8 +19,14 @@ releases:
     projects:
       - repo: openstack/python-openstackclient
         hash: 02172959fe229ad92487d56fef10f781d98da166
+  - version: 2023.1-eom
+    projects:
+      - repo: openstack/python-openstackclient
+        hash: 02172959fe229ad92487d56fef10f781d98da166
 branches:
   - name: stable/2023.1
     location: 6.2.0
+  - name: unmaintained/2023.1
+    location: 2023.1-eom
 release-notes:
   https://docs.openstack.org/releasenotes/python-openstackclient/2023.1.html