[Puppet OpenStack] 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: I2576ffe47fe3ef74f31ba908f3170d1948c17eb7

deliverables/yoga/puppet-manila.yaml

@@ -28,9 +28,15 @@ releases:
     projects:
       - repo: openstack/puppet-manila
         hash: 24cf3b7f15ede1da37f5d1e649c5efaadd80442b
+  - version: yoga-eom
+    projects:
+      - repo: openstack/puppet-manila
+        hash: 24cf3b7f15ede1da37f5d1e649c5efaadd80442b
 repository-settings:
   openstack/puppet-manila: {}
 branches:
   - name: stable/yoga
     location: 20.3.0
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/puppet-manila/yoga.html