[Backport 2.x] fix: flaky test ClusterMetadataManifestTests

[opensearch-trigger-bot]

Backport 6fe9388 from #9728.

[github-actions]

Compatibility status:

Checks if related components are compatible with change 80da4bb

Incompatible components

Incompatible components: [https://github.com/opensearch-project/sql.git, https://github.com/opensearch-project/neural-search.git]

Skipped components

Compatible components

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

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.backwards.MixedClusterClientYamlTestSuiteIT.test {p0=pit/10_basic/Delete all}

• URL: https://build.ci.opensearch.org/job/gradle-check/24598/
• CommitID: 80da4bb
  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

Merging #9804 (80da4bb) into 2.x (affbd76) will increase coverage by 0.03%.
Report is 1 commits behind head on 2.x.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                2.x    #9804      +/-   ##
============================================
+ Coverage     70.81%   70.84%   +0.03%     
- Complexity    58113    58150      +37     
============================================
  Files          4812     4812              
  Lines        274731   274738       +7     
  Branches      40375    40376       +1     
============================================
+ Hits         194549   194640      +91     
+ Misses        63480    63476       -4     
+ Partials      16702    16622      -80     

Files Changed	Coverage Δ
...rg/opensearch/index/translog/RemoteFsTranslog.java	72.54% <100.00%> (+0.97%)	⬆️

... and 465 files with indirect coverage changes