HDDS-14569. Remove support for upgrade actions that run outside of finalization #9716
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What changes were proposed in this pull request?
The upgrade framework currently support various hooks to run actions during the upgrade process. In practice we are only using upgrade actions that run when a layout feature is finalized (
ON_FINALIZE), which are the easiest to reason about. This PR removes support for adding upgrade actions to any other part of the upgrade flow so that we do not need to worry about testing and maintaining them as we iterate on the upgrade framework. This also reduces the chances of developer error when adding layout feature handling.What is the link to the Apache JIRA
HDDS-14569
How was this patch tested?
Existing tests are expected to pass to ensure there are no regressions in the simplification. No new functionality was added to be tested.