[Meta] Remote Store: 2.8.0 - Release Tracking

[sachinpkale]

This meta issue will track remote store feature related tasks that are aimed for OpenSearch 2.8.0 release.
This list is WIP and will be modified as we identify more tasks.

Features

• Back pressure for lagging remote segments upload #6851
• [RFC] [Remote Store] Remote Store Stats API #7153

Enhancements

• [Remote Translog] High failover durations  #7381
• [Remote Store] Add integration tests testing remote translog download for failover usecases #5670
• [Remote Store] Add upload timestamp to metada file to be used in conflict resolution #5475
• [Remote Store] Delete stale commits in async flow #4315
• [Remote Segments] Avoid segments metadata upload if no difference in local store and remote store #7443

Bug Fixes

• [BUG] Assertion failure in replica promotion using remote translog #6195
• [BUG] [Remote Store] Segment upload fails with FileAlreadyExistsException  #7388
• [BUG] org.opensearch.remotestore.SegmentReplicationRemoteStoreIT.testReplicaHasDiffFilesThanPrimary is flaky #7643
• [BUG] org.opensearch.remotestore.SegmentReplicationRemoteStoreIT.testPressureServiceStats is flaky #7592
• [BUG] org.opensearch.remotestore.SegmentReplicationRemoteStoreIT.testReplicationAfterPrimaryRefreshAndFlush is flaky #7685
• [BUG] RemoteDirectory copyFrom leading to File handler leak #7687