Populate RecoveryState details for shallow snapshot restore

[ltaragi]

Is your feature request related to a problem? Please describe

• In a regular active recovery, the recovery stats for the _cat/recovery call are populated as

index | shard | time | type | stage | source_host | source_node | target_host | target_node | repository | snapshot | files | files_recovered | files_percent | files_total | bytes | bytes_recovered | bytes_percent | bytes_total | translog_ops | translog_ops_recovered | translog_ops_percent
movies | 0 | 117ms | empty_store | done | n/a | n/a | 172.18.0.4 | odfe-node1 | n/a | n/a | 0 | 0 | 0.0% | 0 | 0 | 0 | 0.0% | 0 | 0 | 0 | 100.0%
movies | 0 | 382ms | peer | done | 172.18.0.4 | odfe-node1 | 172.18.0.3 | odfe-node2 | n/a | n/a | 1 | 1 |  100.0% | 1 | 208 | 208 | 100.0% | 208 | 1 | 1 | 100.0%

• In case of restoration of shallow snapshots, these functions are never called and the stats are not populated and returned as 0. We should correctly populate the stats in this case too.

Describe the solution you'd like

• Information like bytes_recovered, bytes_total, etc. is obtained from the ReplicationLuceneIndex object of the RecoveryState for the shard being recovered
• ReplicationLuceneIndex gets this data with addFileDetail() and addRecoveredBytesToFile() as and when these are called during the restore flow
• Populating these stats correctly for restoration from shallow snapshots should return the required data in _cat/recovery response

Related component

Storage:Snapshots

Describe alternatives you've considered

No response

Additional context

No response