Bump 2.x to 2.15.0

[reta]

Description

Bump 2.x to 2.15.0

Related Issues

N/A

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• Public documentation issue/PR created

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[kotwanikunal]

Thanks @reta!

[github-actions]

✅ Gradle check result for c9d62fb: SUCCESS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.16%. Comparing base (0dd892c) to head (c9d62fb).
Report is 219 commits behind head on 2.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #13495      +/-   ##
============================================
- Coverage     71.28%   71.16%   -0.13%     
- Complexity    60145    61039     +894     
============================================
  Files          4957     5026      +69     
  Lines        282799   287474    +4675     
  Branches      41409    42017     +608     
============================================
+ Hits         201591   204572    +2981     
- Misses        64189    65567    +1378     
- Partials      17019    17335     +316     

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[owaiskazi19]

Thanks @reta

[peterzhuamazon]

Pending 2.15.0:

• [AUTO] Update input manifests opensearch-build#4674

[peterzhuamazon]

Publish 2.15.0 snapshot:

• https://build.ci.opensearch.org/job/publish-opensearch-min-snapshots/1239/console