[mistral] 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: Icfbb6cb831a25c2e6cc2b649396f02ab6532f4f8

deliverables/yoga/mistral-dashboard.yaml

@@ -20,6 +20,12 @@ releases:
     projects:
       - repo: openstack/mistral-dashboard
         hash: c077728bfa6001f0cb1ac22b0bacd74eb1967b04
+  - version: yoga-eom
+    projects:
+      - repo: openstack/mistral-dashboard
+        hash: c077728bfa6001f0cb1ac22b0bacd74eb1967b04
 branches:
   - name: stable/yoga
     location: 14.0.0.0rc1
+  - name: unmaintained/yoga
+    location: yoga-eom

deliverables/yoga/mistral-extra.yaml

@@ -15,7 +15,13 @@ releases:
     projects:
       - repo: openstack/mistral-extra
         hash: dcfc5d2b3b568ded839ffedafa1c81f4b8a11585
+  - version: yoga-eom
+    projects:
+      - repo: openstack/mistral-extra
+        hash: 4beae859c64356a77f64d7135426fcf0c6f39738
 branches:
   - name: stable/yoga
     location: 11.2.0
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/mistral-extra/yoga.html

deliverables/yoga/mistral-lib.yaml

@@ -11,7 +11,13 @@ releases:
     projects:
       - repo: openstack/mistral-lib
         hash: 44c33f2ccd8b059f68db59114c71ba95dfae574d
+  - version: yoga-eom
+    projects:
+      - repo: openstack/mistral-lib
+        hash: 0e02b352c954b742cae60757e8cebf3a6fc0dc44
 branches:
   - name: stable/yoga
     location: 2.6.0
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/mistral-lib/yoga.html

deliverables/yoga/mistral.yaml

@@ -16,7 +16,13 @@ releases:
       - repo: openstack/mistral
         hash: 28f94b0c64ebbc04729c441c801682e312fc9c64
     diff-start: 13.0.0
+  - version: yoga-eom
+    projects:
+      - repo: openstack/mistral
+        hash: 77116d0dfdcc891f37817e9f1678d6c4c10aeb32
 branches:
   - name: stable/yoga
     location: 14.0.0.0rc1
+  - name: unmaintained/yoga
+    location: yoga-eom
 release-notes: https://docs.openstack.org/releasenotes/mistral/yoga.html

deliverables/yoga/python-mistralclient.yaml

@@ -11,7 +11,14 @@ releases:
     projects:
       - repo: openstack/python-mistralclient
         hash: 608ec45cef72d822d1242e0aefcea7d044662adc
+  - version: yoga-eom
+    projects:
+      - repo: openstack/python-mistralclient
+        hash: c87342a3242cb4af07661e6399ef6d278f25e02b
 branches:
   - name: stable/yoga
     location: 4.4.0
-release-notes: https://docs.openstack.org/releasenotes/python-mistralclient/yoga.html
+  - name: unmaintained/yoga
+    location: yoga-eom
+release-notes:
+  https://docs.openstack.org/releasenotes/python-mistralclient/yoga.html