Enforcing append only setting for star-tree index

[bharath-techie]

Description

Enforcing append only setting for star tree index

Related Issues

Resolves #[Issue number to be closed when this PR is merged]

Check List

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

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.

[github-actions]

✅ Gradle check result for 9385529: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 72.38%. Comparing base (7306905) to head (9385529).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...java/org/opensearch/index/mapper/ObjectMapper.java	0.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #17180      +/-   ##
============================================
+ Coverage     72.36%   72.38%   +0.02%     
+ Complexity    65606    65591      -15     
============================================
  Files          5306     5306              
  Lines        304923   304927       +4     
  Branches      44256    44257       +1     
============================================
+ Hits         220665   220734      +69     
- Misses        66151    66153       +2     
+ Partials      18107    18040      -67     

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[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-17180-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 b2ee0e325f0fefad1c5b29eb93619b3af8b4d27b
# Push it to GitHub
git push --set-upstream origin backport/backport-17180-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-17180-to-2.x.