Add com.google.code.gson:gson to the gradle version catalog

[cwperks]

Description

Add com.google.code.gson:gson to the gradle version catalog

Related Issues

This will help keep this dep consistent across components of the opensearch-project. See opensearch-project/ml-commons#4176 where ml-commons also has this dep and would benefit from centralizing the version.

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 01906e6: SUCCESS

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.91%. Comparing base (1f9eb87) to head (9706d9d).
⚠️ Report is 9 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #19328      +/-   ##
============================================
+ Coverage     72.89%   72.91%   +0.01%     
+ Complexity    69870    69795      -75     
============================================
  Files          5673     5674       +1     
  Lines        320754   320756       +2     
  Branches      46367    46366       -1     
============================================
+ Hits         233824   233888      +64     
+ Misses        68012    67911     -101     
- Partials      18918    18957      +39     

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[github-actions]

✅ Gradle check result for 9706d9d: SUCCESS