[Backport 2.x] Using RemoteDirectory#delete to clear all segments during migration (…

[gbbafna]

…#17021)

Backport 9de21d1 from #17021

[github-actions]

❌ Gradle check result for 845e805: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❕ Gradle check result for 845e805: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.snapshots.DedicatedClusterSnapshotRestoreIT.testSnapshotWithStuckNode

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 72.04%. Comparing base (b436b8d) to head (845e805).
Report is 1 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
...in/java/org/opensearch/index/shard/IndexShard.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #17360      +/-   ##
============================================
- Coverage     72.07%   72.04%   -0.03%     
+ Complexity    66044    66007      -37     
============================================
  Files          5341     5341              
  Lines        307148   307149       +1     
  Branches      44825    44825              
============================================
- Hits         221377   221291      -86     
- Misses        67284    67356      +72     
- Partials      18487    18502      +15     

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