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Prior to this patch, the KillTaskReport contained the
numSegmentsKilled
metric, representing the size of unused segments nuked from the metadata store, rather than the actual number of segments killed from deep storage. For instance, there may be cases where an unused segment won't be killed from deep storage if its load spec is in use by another segment. In such cases, only the metadata will be cleaned up. This patch contains a test for this scenario.Alternatively and at the very least to avoid any confusion, we can capture both the number of nuked segments from the metadata store and the number of segments killed from deep storage as separate metrics in the KillTaskReport.
This PR has: