[adjutant] 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: I2d27b3b6c3e1295f320f50af5e5b735729253caa

deliverables/zed/adjutant-ui.yaml

@@ -16,6 +16,12 @@ releases:
       - repo: openstack/adjutant-ui
         hash: 104c474479e9a89d22b96777378ff59983c03393
     diff-start: 0.5.0
+  - version: zed-eom
+    projects:
+      - repo: openstack/adjutant-ui
+        hash: 104c474479e9a89d22b96777378ff59983c03393
 branches:
   - name: stable/zed
     location: 5.0.0.0rc1
+  - name: unmaintained/zed
+    location: zed-eom

deliverables/zed/adjutant.yaml

@@ -16,6 +16,12 @@ releases:
       - repo: openstack/adjutant
         hash: b305d7285f3ea2e12210e592702c4d66a31d6646
     diff-start: 3.0.0
+  - version: zed-eom
+    projects:
+      - repo: openstack/adjutant
+        hash: 6130d71c626d313b1784df0f3714500fa0f45d26
 branches:
   - name: stable/zed
     location: 5.0.0.0rc1
+  - name: unmaintained/zed
+    location: zed-eom

deliverables/zed/python-adjutantclient.yaml

@@ -11,6 +11,12 @@ releases:
     projects:
       - repo: openstack/python-adjutantclient
         hash: 0930120e836e4d847f87248c3c2ada2d26581c56
+  - version: zed-eom
+    projects:
+      - repo: openstack/python-adjutantclient
+        hash: 98759c95ef6a3862d2a3529d9db5e5cd69fc2ec2
 branches:
   - name: stable/zed
     location: 0.11.0
+  - name: unmaintained/zed
+    location: zed-eom