[Backport 2.x] Add support for append only indices

[opensearch-trigger-bot]

Backport 5e12737 from #17039.

[github-actions]

✅ Gradle check result for 1ad16c6: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 59.42029% with 28 lines in your changes missing coverage. Please review.

Project coverage is 71.89%. Comparing base (f4acda3) to head (1ad16c6).
Report is 2 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
...rg/opensearch/action/bulk/TransportBulkAction.java	13.04%	18 Missing and 2 partials ⚠️
...va/org/opensearch/index/engine/InternalEngine.java	61.90%	4 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #17158      +/-   ##
============================================
- Coverage     72.06%   71.89%   -0.17%     
+ Complexity    65875    65828      -47     
============================================
  Files          5325     5326       +1     
  Lines        306408   306459      +51     
  Branches      44701    44710       +9     
============================================
- Hits         220819   220335     -484     
- Misses        67188    67728     +540     
+ Partials      18401    18396       -5     

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