[blazar] Transition Zed to Unmaintained

This branch reached the end of its official stable maintained period,
hence this patch transition stable/zed branch to Unmaintained. (For
details about Unmaintained state please see: [1][2])

The transitions is as follows:
- tip of the stable/zed branch is tagged with zed-eom tag
- unmaintained/zed branch will be cut from zed-eom tag
- stable/zed branch will be deleted

Note:
- there will no longer be official releases off of zed branch after this
  transition
- backports can be pushed to unmaintained/yoga branch
- openstack-unmaintained-core (or <project>-unmaintained-core groups if
  such exists) have the rights to merge patches

Important: please +1 if the team is ready for us to proceed with this
transition, or -1 if there are any final Zed stable release with
backports currently in flight that we should wait for. For the latter
case, please propose a final Zed stable release patch, and rebase this
patch on top of that, with the latest commit hash of stable/zed.

The transition deadline is May 2nd, 2024. [3]

[1] https://docs.openstack.org/project-team-guide/stable-branches.html#unmaintained
[2] https://governance.openstack.org/tc/resolutions/20230724-unmaintained-branches.html
[3] https://releases.openstack.org

Change-Id: I153a46b084702dc6c18eb2a384621bbeffdf04e1

deliverables/zed/blazar-dashboard.yaml

@@ -16,7 +16,13 @@ releases:
       - repo: openstack/blazar-dashboard
         hash: 837eb584283fdfa9b36808816ace7177a023bb8f
     diff-start: 7.0.0
+  - version: zed-eom
+    projects:
+      - repo: openstack/blazar-dashboard
+        hash: ac7151a20837fb3d3595b134bb8e2448f092f933
 branches:
   - name: stable/zed
     location: 8.0.0.0rc1
+  - name: unmaintained/zed
+    location: zed-eom
 release-notes: https://docs.openstack.org/releasenotes/blazar-dashboard/zed.html

deliverables/zed/blazar-nova.yaml

@@ -15,7 +15,13 @@ releases:
     projects:
       - repo: openstack/blazar-nova
         hash: 2cb1dada5bbc14cff89faa41f172193252de703e
+  - version: zed-eom
+    projects:
+      - repo: openstack/blazar-nova
+        hash: 5b8f4bb4eb3150620a0bea6e506d7c1af312bc77
 branches:
   - name: stable/zed
     location: 2.6.1
+  - name: unmaintained/zed
+    location: zed-eom
 release-notes: https://docs.openstack.org/releasenotes/blazar-nova/zed.html

deliverables/zed/blazar.yaml

@@ -18,7 +18,13 @@ releases:
       - repo: openstack/blazar
         hash: 9ed6780f11630fca6d881d220109e30085ba11de
     diff-start: 9.0.0
+  - version: zed-eom
+    projects:
+      - repo: openstack/blazar
+        hash: b826d6dcf72948bdf8ede9c246014b8e60e6c169
 branches:
   - name: stable/zed
     location: 10.0.0.0rc1
+  - name: unmaintained/zed
+    location: zed-eom
 release-notes: https://docs.openstack.org/releasenotes/blazar/zed.html

deliverables/zed/python-blazarclient.yaml

@@ -11,7 +11,14 @@ releases:
     projects:
       - repo: openstack/python-blazarclient
         hash: 2dabe787704e9cd66431afd9565cd2aef6e975b4
+  - version: zed-eom
+    projects:
+      - repo: openstack/python-blazarclient
+        hash: 9f5bcd77b2b6b7609ec1a6dc870a4944399ec027
 branches:
   - name: stable/zed
     location: 3.5.0
-release-notes: https://docs.openstack.org/releasenotes/python-blazarclient/zed.html
+  - name: unmaintained/zed
+    location: zed-eom
+release-notes:
+  https://docs.openstack.org/releasenotes/python-blazarclient/zed.html