KAFKA-18966: Change controller_num_nodes_override to override_num_isolated_controllers

[CalvinConfluent]

trafficstars

Bounce the broker that hosting the controller can cause unnecessary downtime for the partition. Avoid creating only 1 controller node in the combined kraft mode. For more details please check https://issues.apache.org/jira/browse/KAFKA-18966

[chia7712]

@CalvinConfluent Could you please share the tests to me? I'd like to test it on my local to ensure it does reduce the test time.

[CalvinConfluent]

@chia7712 Thanks for checking. It is the transactions_test.py where Combined_kraft and hard_bounce are used. The transaction timeout is 40s, in my environment, the controller restart time(broker restart + controller starting handle ISR updates) is very close to 40s which makes the test flaky. I may update the PR a bit.

[CalvinConfluent]

@chia7712 Can you help take another look?

[github-actions[bot]]

This PR is being marked as stale since it has not had any activity in 90 days. If you would like to keep this PR alive, please leave a comment asking for a review. If the PR has merge conflicts, update it with the latest from the base branch.

If you are having difficulty finding a reviewer, please reach out on the [mailing list](https://kafka.apache.org/contact).

If this PR is no longer valid or desired, please feel free to close it. If no activity occurs in the next 30 days, it will be automatically closed.

[github-actions[bot]]

This PR has been closed since it has not had any activity in 120 days. If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open the PR and ask for a review.