[Star tree] Support for keyword changes as part of star tree mapper

[bharath-techie]

Description

This PR supports keyword fields as part of the star tree mapping.

This is built on top of date mapping PR.

Related Issues

Resolves #16232

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 249fa53: 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 49dd2f5: FAILURE

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[github-actions]

❌ Gradle check result for 5d1414e: FAILURE

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[github-actions]

❌ Gradle check result for bc6fe9b: FAILURE

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[github-actions]

❕ Gradle check result for e795925: 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 53.33333% with 14 lines in your changes missing coverage. Please review.

Project coverage is 72.02%. Comparing base (a81b868) to head (e795925).
Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
...ndex/compositeindex/datacube/KeywordDimension.java	55.55%	8 Missing ⚠️
...ndex/compositeindex/datacube/DimensionFactory.java	33.33%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #16103      +/-   ##
============================================
+ Coverage     71.94%   72.02%   +0.07%     
- Complexity    64612    64783     +171     
============================================
  Files          5298     5304       +6     
  Lines        301952   302500     +548     
  Branches      43627    43698      +71     
============================================
+ Hits         217247   217880     +633     
+ Misses        66884    66764     -120     
- Partials      17821    17856      +35     

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