Add support for append only indices

[RS146BIJAY]

Description

Adding support for Append only indices where we are disabling any form of updates and deletes on the index. We are also preventing passing a custom doc id for bulk indexing requests. Append only indices will be supported through a configurable setting. If this setting is enabled, all update and delete operations on the index (UPDATE, DELETE, UPSERT, UPDATE BY QUERY, DELETE BY QUERY, etc,) will be blocked.

Related Issues

#12886

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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[github-actions]

❌ Gradle check result for 38061f7: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for 7af2713: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[mgodwan]

If indexing into lucene ever causes the version to be greater than 1, should we fail the shard?

[github-actions]

❌ Gradle check result for 8004cab: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

✅ Gradle check result for 8870b45: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 43.47826% with 39 lines in your changes missing coverage. Please review.

Project coverage is 72.25%. Comparing base (e6fc600) to head (1acf39b).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...rg/opensearch/action/bulk/TransportBulkAction.java	13.04%	18 Missing and 2 partials ⚠️
...earch/action/bulk/BulkPrimaryExecutionContext.java	42.10%	10 Missing and 1 partial ⚠️
...va/org/opensearch/index/engine/InternalEngine.java	61.90%	4 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #17039      +/-   ##
============================================
- Coverage     72.34%   72.25%   -0.10%     
- Complexity    65481    65487       +6     
============================================
  Files          5300     5302       +2     
  Lines        304330   304574     +244     
  Branches      44141    44183      +42     
============================================
- Hits         220158   220057     -101     
- Misses        66093    66478     +385     
+ Partials      18079    18039      -40     

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[github-actions]

✅ Gradle check result for 331fc41: SUCCESS

[github-actions]

✅ Gradle check result for 1acf39b: SUCCESS

[RS146BIJAY]

Code coverage is taken care by Integ test cases

[shwetathareja]

@RS146BIJAY we will need documentation PR for the new setting

[RS146BIJAY]

@RS146BIJAY we will need documentation PR for the new setting

Ack. Will raise a separate documentation PR.