Correct k8s rebalance delay advice [CTT-820]

[JamesHazelcast]

configuring-persistence conflicted with kubernetes-persistence when discussing rebalance-delay-seconds usage. The correct advice is from kubernetes-persistence.

Fixes https://hazelcast.atlassian.net/browse/CTT-820

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[Rob-Hazelcast]

Possibly "warning" is too strong (I don't know what happens if you do configure a delay on K8s), but I thought it sensible to put the "don't configure this under these circumstances" statements together.

And while it's good to avoid duplication, I wanted to include the main point here rather than just linking to the other section for more info (without noting that the advice conflicts, rather than being purely supplementary/optional).

[JamesHazelcast]

Possibly "warning" is too strong (I don't know what happens if you do configure a delay on K8s), but I thought it sensible to put the "don't configure this under these circumstances" statements together.

And while it's good to avoid duplication, I wanted to include the main point here rather than just linking to the other section for more info (without noting that the advice conflicts, rather than being purely supplementary/optional).

Makes sense, thanks for the edits Rob

[github-actions]

👍 Created #2098 to backport into v/5.5.

[github-actions]

👍 Created #2099 to backport into v/5.4.

[github-actions]

👍 Created #2100 to backport into v/5.6.