rgw: auto-clean reshard queue entries for non-existent buckets #31323
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It is possible for a bucket to be added to the reshard queue and then to be removed before its entry in the reshard queue is processed. Prior to this pr, the entry would remain on the reshard queue and stop the queue from being processed further. With this pr, the entry will be automatically removed with appropriate log entries and processing of the queue can continue.
Tracker: https://tracker.ceph.com/issues/42595