Handle FileNotFoundException in region replica replay for flush/compaction events

I had this patch laying around that somehow dropped from my plate. We should skip replaying compaction / flush and region open event markers if the files (from flush or compaction) can no longer be found from the secondary. If we do not skip, the replay will be retried forever, effectively blocking the replication further.

Bulk load already does this, we just need to do it for flush / compaction and region open events as well.