[octavia] 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: Ice936039c015c9016e7fd65f0c3b749eb630bac1

deliverables/yoga/octavia-dashboard.yaml

@@ -21,8 +21,14 @@ releases:
     projects:
       - repo: openstack/octavia-dashboard
         hash: a0c9c12afdba96cff5e3ce617eb29943594b448c
+  - version: yoga-eom
+    projects:
+      - repo: openstack/octavia-dashboard
+        hash: a0c9c12afdba96cff5e3ce617eb29943594b448c
 branches:
   - name: stable/yoga
     location: 9.0.0.0rc1
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes:
   https://docs.openstack.org/releasenotes/octavia-dashboard/yoga.html

deliverables/yoga/octavia-lib.yaml

@@ -12,7 +12,13 @@ releases:
     projects:
       - repo: openstack/octavia-lib
         hash: 4f217dd4fa7e932d19d756e73469529a5b4f99c6
+  - version: yoga-eom
+    projects:
+      - repo: openstack/octavia-lib
+        hash: c6aebb6ef4d6c6f579bb31272af579e1825f98fe
 branches:
   - name: stable/yoga
     location: 2.5.0
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/octavia-lib/yoga.html

deliverables/yoga/octavia.yaml

@@ -33,7 +33,13 @@ releases:
     projects:
       - repo: openstack/octavia
         hash: 8f1b0b92a78c86c6b90c2c5b119c02dd4fede01b
+  - version: yoga-eom
+    projects:
+      - repo: openstack/octavia
+        hash: 8f1b0b92a78c86c6b90c2c5b119c02dd4fede01b
 branches:
   - name: stable/yoga
     location: 10.0.0.0rc1
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/octavia/yoga.html

deliverables/yoga/python-octaviaclient.yaml

@@ -15,8 +15,14 @@ releases:
     projects:
       - repo: openstack/python-octaviaclient
         hash: 6502d66bb213d0e0af4b1b3c8b5e998d51d0e8be
+  - version: yoga-eom
+    projects:
+      - repo: openstack/python-octaviaclient
+        hash: 6502d66bb213d0e0af4b1b3c8b5e998d51d0e8be
 branches:
   - name: stable/yoga
     location: 2.5.0
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes:
   https://docs.openstack.org/releasenotes/python-octaviaclient/yoga.html