[OpenStackSDK] Transition Yoga to Unmaintained

With the new TC resolution the community replaces Extended Maintenance
with Unmaintained status [1].

So this patch transitions stable/yoga branch to Unmaintained as follows:
- tip of the stable/yoga branch is tagged with yoga-eom tag
- unmaintained/yoga branch will be cut from yoga-eom tag
- stable/yoga branch will be deleted

Some further notes:
- there will no longer be official releases off of yoga branch
- backports can be pushed against unmaintained/yoga branch
- openstack-unmaintained-core and <project>-unmaintained-core groups
  will have the rights to merge patches

For further details please read the resolution [1] & review and +1 this
patch if this is correct as soon as possible.

[1] https://governance.openstack.org/tc/resolutions/20230724-unmaintained-branches.html

Change-Id: I3286cfeae3afecae468b806be43335087bb51989

deliverables/yoga/cliff.yaml

@@ -15,6 +15,12 @@ releases:
     projects:
       - repo: openstack/cliff
         hash: a04a48f4f7dc72b1bcc95a5c6a550c7650e35ab3
+  - version: yoga-eom
+    projects:
+      - repo: openstack/cliff
+        hash: d5a5d7c7c5a6470041633fffb06c1f9a696809ac
 branches:
   - name: stable/yoga
     location: 3.10.1
+  - name: unmaintained/yoga
+    location: yoga-eom

deliverables/yoga/openstacksdk.yaml

@@ -19,7 +19,13 @@ releases:
     projects:
       - repo: openstack/openstacksdk
         hash: 4ceff8f3bbca2f448635011efc01fe950ad0c7bc
+  - version: yoga-eom
+    projects:
+      - repo: openstack/openstacksdk
+        hash: 637dfce02adcc3da3ea8136b2356914ba838ad79
 branches:
   - name: stable/yoga
     location: 0.61.0
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/openstacksdk/yoga.html

deliverables/yoga/osc-lib.yaml

@@ -11,7 +11,13 @@ releases:
     projects:
       - repo: openstack/osc-lib
         hash: 78d276e7223420212a6f63239d48cc794d2054ef
+  - version: yoga-eom
+    projects:
+      - repo: openstack/osc-lib
+        hash: cd83b7d460e18b98c2efde06f4d29dba11b55d40
 branches:
   - name: stable/yoga
     location: 2.5.0
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/osc-lib/yoga.html

deliverables/yoga/python-openstackclient.yaml

@@ -19,8 +19,14 @@ releases:
     projects:
       - repo: openstack/python-openstackclient
         hash: f4748f4d250d4d8eb592b7170f1e020f9ece8df3
+  - version: yoga-eom
+    projects:
+      - repo: openstack/python-openstackclient
+        hash: f4748f4d250d4d8eb592b7170f1e020f9ece8df3
 branches:
   - name: stable/yoga
     location: 5.8.0
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes:
   https://docs.openstack.org/releasenotes/python-openstackclient/yoga.html