[Backport 2.x] Fix issue when calling Delete PIT endpoint and no PITs exist

[opensearch-trigger-bot]

Backport c52d4a3 from #11711.

[github-actions]

Compatibility status:

Checks if related components are compatible with change b9fcb26

Incompatible components

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/sql.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/performance-analyzer.git]

[github-actions]

❕ Gradle check result for b9fcb26: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.remotestore.RemoteIndexPrimaryRelocationIT.testPrimaryRelocationWhileIndexing

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: 1 lines in your changes are missing coverage. Please review.

Comparison is base (ab9c3c6) 71.15% compared to head (b9fcb26) 71.15%.
Report is 2 commits behind head on 2.x.

Files	Patch %	Lines
...h/cluster/metadata/MetadataCreateIndexService.java	92.30%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##                2.x   #11713   +/-   ##
=========================================
  Coverage     71.15%   71.15%           
+ Complexity    59365    59299   -66     
=========================================
  Files          4883     4883           
  Lines        279314   279329   +15     
  Branches      40934    40935    +1     
=========================================
+ Hits         198749   198767   +18     
+ Misses        63740    63726   -14     
- Partials      16825    16836   +11     

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