[HUDI-3556] Re-use rollback instant for rolling back of clustering and compaction if rollback failed mid-way #4971
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What is the purpose of the pull request
If clustering/compaction rollback failed mid-way, if rollback of a pending clustering/compaction is re-attempted, a new rollback instant will be generated. We would want to retry using the same rollback instant. Main motivation is that, the old failed rollback instant is never cleaned up. And so it could lead to liveness issues w/ metadata table.
Brief change log
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This change added tests and can be verified as follows:
Committer checklist
Has a corresponding JIRA in PR title & commit
Commit message is descriptive of the change
CI is green
Necessary doc changes done or have another open PR
For large changes, please consider breaking it into sub-tasks under an umbrella JIRA.