[Backport 2.x] Star tree mapping changes

[opensearch-trigger-bot]

Backport 6267e94 from #14605.

[github-actions]

❕ Gradle check result for 9ad161c: UNSTABLE

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

Attention: Patch coverage is 75.39062% with 126 lines in your changes missing coverage. Please review.

Project coverage is 71.59%. Comparing base (3a1be63) to head (9ad161c).
Report is 169 commits behind head on 2.x.

Files	Patch %	Lines
...va/org/opensearch/index/mapper/StarTreeMapper.java	81.81%	20 Missing and 8 partials ⚠️
...java/org/opensearch/index/mapper/ObjectMapper.java	56.60%	14 Missing and 9 partials ⚠️
...siteindex/datacube/startree/StarTreeValidator.java	65.78%	9 Missing and 4 partials ⚠️
...ndex/compositeindex/datacube/DimensionFactory.java	58.62%	8 Missing and 4 partials ⚠️
.../datacube/startree/StarTreeFieldConfiguration.java	72.72%	6 Missing and 3 partials ⚠️
...ompositeindex/datacube/startree/StarTreeField.java	80.00%	2 Missing and 5 partials ⚠️
...nsearch/index/mapper/CompositeMappedFieldType.java	64.70%	6 Missing ⚠️
...h/index/compositeindex/CompositeIndexSettings.java	58.33%	4 Missing and 1 partial ⚠️
.../index/compositeindex/CompositeIndexValidator.java	50.00%	3 Missing and 1 partial ⚠️
...ensearch/index/compositeindex/datacube/Metric.java	80.00%	1 Missing and 3 partials ⚠️
... and 8 more

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #14655      +/-   ##
============================================
+ Coverage     71.50%   71.59%   +0.09%     
- Complexity    62406    62523     +117     
============================================
  Files          5103     5117      +14     
  Lines        293265   293774     +509     
  Branches      42730    42812      +82     
============================================
+ Hits         209689   210341     +652     
+ Misses        65946    65744     -202     
- Partials      17630    17689      +59     

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[dblock]

@bharath-techie this was not merged, it will need a manual backport please

[dblock]

@sachinpkale

[sarthakaggarwal97]

@dblock I think this is not getting backported to this 2.16, and will be tagged with 2.17
I will let @bharath-techie and @sachinpkale confirm once tho

[dblock]

This has not been backported to any 2.x though. If it's 2.17 it can be backported now.

[bharath-techie]

This has not been backported to any 2.x though. If it's 2.17 it can be backported now.

Hey yes this will be part of 2.17.

[dblock]

This has not been backported to any 2.x though. If it's 2.17 it can be backported now.

Hey yes this will be part of 2.17.

Cool. You should rebase this PR now and we can merge it to 2.x.

[getsaurabh02]

Updating the PR label to 2.17. Please continue wit the 2.x backport

[bharath-techie]

This is already merged, so closing