[winstackers] 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: I12502ea3e4695bf920816dc6b89826e1b7d861c3

deliverables/yoga/compute-hyperv.yaml

@@ -17,6 +17,12 @@ releases:
       - repo: openstack/compute-hyperv
         hash: 6143a64329f51ea20be4237457b32c63069ff991
     diff-start: 13.0.0
+  - version: yoga-eom
+    projects:
+      - repo: openstack/compute-hyperv
+        hash: f9511ee6f24b25eb76e5d26845b8e432b220f345
 branches:
   - name: stable/yoga
     location: 14.0.0.0rc1
+  - name: unmaintained/yoga
+    location: yoga-eom

deliverables/yoga/networking-hyperv.yaml

@@ -18,7 +18,14 @@ releases:
       - repo: openstack/networking-hyperv
         hash: 7619f8c9974dcceeb4f04b43c30564a753c357ec
     diff-start: 11.0.0
+  - version: yoga-eom
+    projects:
+      - repo: openstack/networking-hyperv
+        hash: 0c60bb4c72c6e8f8a12f593d5c39aaae52de514b
 branches:
   - name: stable/yoga
     location: 12.0.0.0rc1
-release-notes: https://docs.openstack.org/releasenotes/networking-hyperv/yoga.html
+  - name: unmaintained/yoga
+    location: yoga-eom
+release-notes:
+  https://docs.openstack.org/releasenotes/networking-hyperv/yoga.html

deliverables/yoga/os-win.yaml

@@ -13,7 +13,13 @@ releases:
     projects:
       - repo: openstack/os-win
         hash: 283af66f3097415b4013fde61f29b5d3b7b02a32
+  - version: yoga-eom
+    projects:
+      - repo: openstack/os-win
+        hash: 31abc0ec229277e03bc9778b7ba0c80b3d32c25c
 branches:
   - name: stable/yoga
     location: 5.6.0
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/os-win/yoga.html