Fix build-health CI check by increasing heap size for gradle

[cwperks]

Description

This PR fixes build-health CI check by increasing heap size for gradle

• Category (Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation)

Maintenance

Check List

• New functionality includes testing
• New functionality has been documented
• New Roles/Permissions have a corresponding security dashboards plugin PR
• API changes companion pull request created
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.74%. Comparing base (13fca0d) to head (8fe3c1b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5836      +/-   ##
==========================================
+ Coverage   73.66%   73.74%   +0.07%     
==========================================
  Files         438      438              
  Lines       26642    26642              
  Branches     3937     3937              
==========================================
+ Hits        19626    19647      +21     
+ Misses       5147     5125      -22     
- Partials     1869     1870       +1     

see 8 files with indirect coverage changes

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[shikharj05]

nit: MaxMetaspaceSize is unlimited by default, this would reduce it to 512m - should be okay though.