[manila] 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: I34852064211ad38a963c70fd877f2e44d4118265

deliverables/yoga/manila-ui.yaml

@@ -20,7 +20,13 @@ releases:
     projects:
       - repo: openstack/manila-ui
         hash: 48e3c2b05102fc1033f7cc63e6e323ee97d9a3f3
+  - version: yoga-eom
+    projects:
+      - repo: openstack/manila-ui
+        hash: 48e3c2b05102fc1033f7cc63e6e323ee97d9a3f3
 branches:
   - name: stable/yoga
     location: 7.0.0.0rc1
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/manila-ui/yoga.html

deliverables/yoga/manila.yaml

@@ -48,7 +48,13 @@ releases:
     projects:
       - repo: openstack/manila
         hash: 84111ad7cb4496d1083703fba8f0e55002347363
+  - version: yoga-eom
+    projects:
+      - repo: openstack/manila
+        hash: 84111ad7cb4496d1083703fba8f0e55002347363
 branches:
   - name: stable/yoga
     location: 14.0.0.0rc1
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/manila/yoga.html

deliverables/yoga/python-manilaclient.yaml

@@ -27,7 +27,14 @@ releases:
     projects:
       - repo: openstack/python-manilaclient
         hash: fe37b459b5b43ea549f44b29441becb4c8e67308
+  - version: yoga-eom
+    projects:
+      - repo: openstack/python-manilaclient
+        hash: 8fe462e726c5ffa549fc32a91f3966b22f1886f3
 branches:
   - name: stable/yoga
     location: 3.3.0
-release-notes: https://docs.openstack.org/releasenotes/python-manilaclient/yoga.html
+  - name: unmaintained/yoga
+    location: yoga-eom
+release-notes:
+  https://docs.openstack.org/releasenotes/python-manilaclient/yoga.html