[Snapshot V2] Integrate delete snapshot flow with pinned timestamp #15255
Description
Is your feature request related to a problem? Please describe
- The snapshots created with pinned timestamp need to unpin the timestamp at the time of deletion.
- The snapshots created with pinned timestamp doesn't write per shard snapshot metadata files for which LIST call at the time of cleanup in not needed
- The snapshots created with pinned timestamp doesn't have to explicitly cleanup lock files at the time of deletion.
More details can be found in the RFC - There is a separate issue to handle remote store file cleanup for deleted indices - [Snapshot V2] Add support for remote store files cleanup #15466
Related component
Storage:Snapshots
Describe alternatives you've considered
NA
Additional context
No response