4.1, by @Ayanda-D: stop QQ replicas when a QQ is forced to shrink to a single replica (backport #12468)

[mergify]

This is #12427 by @Ayanda-D.

Shrinking operations did not stop QQ replicas. This was easy to miss because QQs are usually shrunk before a node is removed from the cluster.

However, there is a scenario where this is not the case. If some nodes (replicas) need to be replaced, in particular when a majority of nodes cannot be recovered for any reasons, the recovery process will involve shrinking a QQ to just one member so that it has an online quorum (of 1 node out of 1) before new replicas can be added.

For this to succeed, the older replicas must be stopped and deleted from the (QQ) cluster.

---

This is an automatic backport of pull request #12468 done by Mergify.

[mergify]

Cherry-pick of d9de6d9 has failed:

On branch mergify/bp/v4.0.x/pr-12468
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Cherry-pick of b03637f has failed:

On branch mergify/bp/v4.0.x/pr-12468
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Cherry-pick of c9d97e6 has failed:

On branch mergify/bp/v4.0.x/pr-12468
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Cherry-pick of 16170d0 has failed:

On branch mergify/bp/v4.0.x/pr-12468
Your branch is ahead of 'origin/v4.0.x' by 4 commits.
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Unmerged paths:
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	both modified:   deps/rabbit/src/rabbit_quorum_queue.erl

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To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[michaelklishin]

Already backported manually.