[freezer] 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: Ia08e24b5dc020dcb42d4f6fdd8702927d85528cc

deliverables/zed/freezer-web-ui.yaml

@@ -16,6 +16,12 @@ releases:
       - repo: openstack/freezer-web-ui
         hash: 33db4d1d81d01ce468a7c06223ff0ad4220b64a0
     diff-start: 12.0.0
+  - version: zed-eom
+    projects:
+      - repo: openstack/freezer-web-ui
+        hash: ce855b7d45e73bcedb46352444e66ef305be980d
 branches:
   - name: stable/zed
     location: 13.0.0.0rc1
+  - name: unmaintained/zed
+    location: zed-eom

deliverables/zed/freezer.yaml

@@ -25,7 +25,17 @@ releases:
       - repo: openstack/freezer-dr
         hash: ba060b277d6d109bd06539550de0c7d43ee7755b
     diff-start: 12.0.0
+  - version: zed-eom
+    projects:
+      - repo: openstack/freezer
+        hash: 6c7d8a3ab9cb51fd1d185ce084292e09837139c7
+      - repo: openstack/freezer-api
+        hash: ef4e4efef8503c6f4a4f527f326a2b8cd10a327c
+      - repo: openstack/freezer-dr
+        hash: ba060b277d6d109bd06539550de0c7d43ee7755b
 branches:
   - name: stable/zed
     location: 13.0.0.0rc1
+  - name: unmaintained/zed
+    location: zed-eom
 release-notes: https://docs.openstack.org/releasenotes/freezer/zed.html

deliverables/zed/python-freezerclient.yaml

@@ -11,6 +11,12 @@ releases:
     projects:
       - repo: openstack/python-freezerclient
         hash: 2b112fc493e13ca21d24d405d9659d04e6536ebd
+  - version: zed-eom
+    projects:
+      - repo: openstack/python-freezerclient
+        hash: 80ef995614f461aeb88a148581c2eafdc24f3105
 branches:
   - name: stable/zed
     location: 5.0.0
+  - name: unmaintained/zed
+    location: zed-eom