[Bugfix] Fix unknown parameter source_remote_translog_repository bug

[sachinpkale]

Description

• As part of shallow snapshot V2 restore, we introduced source_remote_translog_repository field in the RestoreSnapshotRequest in order to restore snapshot from one cluster to another.
• But using source_remote_translog_repository fails with unknown parameter error:

% curl -X POST "localhost:9200/_snapshot/backup-snapshot/S_1/_restore?pretty" -H 'Content-Type: application/json' -d'
{
  "indices": "my-index-1",
  "source_remote_store_repository": "backup-segment",
  "source_remote_translog_repository": "backup-translog"
}
'
{
  "error" : {
    "root_cause" : [
      {
        "type" : "illegal_argument_exception",
        "reason" : "Unknown parameter source_remote_translog_repository"
      }
    ],
    "type" : "illegal_argument_exception",
    "reason" : "Unknown parameter source_remote_translog_repository"
  },
  "status" : 400
}

• This was a miss while constructing RestoreSnapshotRequest that is fixed in this PR.

Related Issues

• [BUG] Shallow snapshot V2 restore with source_remote_translog_repository fails with unknown parameter #16188

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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[github-actions]

✅ Gradle check result for 28e4012: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 71.95%. Comparing base (aef7eca) to head (28e4012).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...ster/snapshots/restore/RestoreSnapshotRequest.java	0.00%	3 Missing and 1 partial ⚠️
...apshots/restore/RestoreSnapshotRequestBuilder.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #16192      +/-   ##
============================================
- Coverage     72.00%   71.95%   -0.06%     
+ Complexity    64640    64590      -50     
============================================
  Files          5296     5296              
  Lines        301746   301752       +6     
  Branches      43586    43588       +2     
============================================
- Hits         217270   217111     -159     
- Misses        66669    66809     +140     
- Partials      17807    17832      +25     

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