[Segment Replication] Experimental Release Tracking

[mch2]

This issue tracks work required to complete an experimental release of Segment Replication.

• Adjust dynamic timeout for get_segment_files operation to prevent request timeouts #4392

• [Segment Replicatin] [Bug] Replica shard failure due to different files during get checkpoint info #4295

• [Segment Replication] [BUG] Deleted docs remain searchable on replica after refresh #4216

• [Segment Replication] [BUG] Primary hits NoSuchFileException computing metadata snapshot. #4178

• [Segment Replication] [BUG] file handle leak in SegmentFileTransferHandler #4205

• [Segment Replication] Remove unnecessary calls to directory.fsync and directory.syncmetadata #2333

• [Segment Replication] Swap replica to writeable engine during failover. #3989

• [Segment Replication] Swap primary engine to NRTReplicationEngine during handoff. #4007

• [Segment Replication][BUG] Global checkpoint out of sync with local checkpoint on replica #2873

• [Segment Replication] Peer recovery checkpoint publication invariants #3923

• [Segment Replication] Update IndexShard recovery path to work with Segment Replication. #3483

• [Segment Replication BUG] Replica shard fails during segment replication during indexing / bulk indexing calls #4129

• [Segment Replication] [BUG] Document update action fails segment replication #3787