[Backport 2.x] Updating the separator for RemoteStoreLockManager since underscore is allowed in base64UUID url charset

[opensearch-trigger-bot]

Backport 66aef13 from #10379.

[github-actions]

Compatibility status:

Checks if related components are compatible with change 9d013fd

Incompatible components

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

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.smoketest.SmokeTestMultiNodeClientYamlTestSuiteIT.test {yaml=pit/10_basic/Delete all}

• URL: https://build.ci.opensearch.org/job/gradle-check/27213/
• CommitID: 9d013fd
  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 #10428 (9d013fd) into 2.x (fc7dc20) will increase coverage by 0.21%.
Report is 10 commits behind head on 2.x.
The diff coverage is 79.38%.

@@             Coverage Diff              @@
##                2.x   #10428      +/-   ##
============================================
+ Coverage     70.75%   70.96%   +0.21%     
- Complexity    58397    58556     +159     
============================================
  Files          4816     4829      +13     
  Lines        276031   276342     +311     
  Branches      40565    40576      +11     
============================================
+ Hits         195306   196110     +804     
+ Misses        64105    63536     -569     
- Partials      16620    16696      +76     

Files	Coverage Δ
...arch/telemetry/metrics/DefaultMetricsRegistry.java	100.00% <100.00%> (ø)
...ch/telemetry/metrics/noop/NoopMetricsRegistry.java	100.00% <100.00%> (ø)
...va/org/opensearch/telemetry/metrics/tags/Tags.java	100.00% <100.00%> (ø)
...org/opensearch/repositories/url/URLRepository.java	72.00% <100.00%> (ø)
...g/opensearch/transport/netty4/Netty4Transport.java	73.65% <100.00%> (ø)
...opensearch/repositories/azure/AzureRepository.java	68.88% <100.00%> (-1.33%)	⬇️
...g/opensearch/repositories/hdfs/HdfsRepository.java	61.90% <100.00%> (ø)
...java/org/opensearch/repositories/s3/S3Service.java	76.04% <100.00%> (ø)
.../org/opensearch/telemetry/OTelTelemetryPlugin.java	100.00% <100.00%> (ø)
...rg/opensearch/telemetry/OTelTelemetrySettings.java	100.00% <100.00%> (ø)
... and 41 more

... and 487 files with indirect coverage changes