[Quality Assurance] Transition Rocky to End of Life

As discussed in the mail thread [1][2], this patch transition the Rocky
branch to End of Life. The last patch of the branch will be tagged with
rocky-eol tag. stable/rocky branch cannot be used anymore and will be
deleted if this patch merges.

This is needed as stable/rocky is not actively maintained in recent
period, thus gates are mostly broken due to job failures. Besides,
by removing these branches, infra resources will be freed up, too.

Please try to identify any zuul job, that is defined outside of the
repositories in this patch (for example in openstack-zuul-jobs, etc.)
and won't be used anymore if stable/rocky is deleted. Propose a job
removal patch for them.

Please +1 if the team is ready for us to proceed with this transition,
or -1 if there are still some activity on the branch and the team wants
to continue to maintain it.

[1] https://lists.openstack.org/pipermail/openstack-discuss/2023-January/031922.html
[2] https://lists.openstack.org/pipermail/openstack-discuss/2023-April/033386.html

Change-Id: Ia9edf6f9a1a94b934fca5e1e831700a136983b17

deliverables/rocky/devstack-plugin-container.yaml

@@ -1,7 +1,7 @@
 ---
 launchpad: devstack
 release-model: untagged
-team: 'Quality Assurance'
+team: Quality Assurance
 type: other
 stable-branch-type: tagless
 branches:
@@ -10,3 +10,8 @@ branches:
     name: stable/rocky
 repository-settings:
   openstack/devstack-plugin-container: {}
+releases:
+  - version: rocky-eol
+    projects:
+      - repo: openstack/devstack-plugin-container
+        hash: 951ab426ae2d5a987e1305379c3173c190c8fcfb

deliverables/rocky/devstack.yaml

@@ -1,7 +1,7 @@
 ---
 launchpad: devstack
 release-model: untagged
-team: 'Quality Assurance'
+team: Quality Assurance
 type: other
 stable-branch-type: tagless
 branches:
@@ -10,3 +10,8 @@ branches:
     name: stable/rocky
 repository-settings:
   openstack/devstack: {}
+releases:
+  - version: rocky-eol
+    projects:
+      - repo: openstack/devstack
+        hash: 6e50bc78749c944f2a8598c6129605a2820ecebf

deliverables/rocky/grenade.yaml

@@ -1,7 +1,7 @@
 ---
 launchpad: grenade
 release-model: untagged
-team: 'Quality Assurance'
+team: Quality Assurance
 type: other
 stable-branch-type: tagless
 branches:
@@ -10,3 +10,8 @@ branches:
     name: stable/rocky
 repository-settings:
   openstack/grenade: {}
+releases:
+  - version: rocky-eol
+    projects:
+      - repo: openstack/grenade
+        hash: b6589818b35292c152eed6cc546a178b76254619