Update Build_LLVM reusable action to reduce cache size

[mcbarton]

Description

Please include a summary of changes, motivation and context for this PR.

This PR is an attempt to update the Build_LLVM reusable action to reduce cache size

Fixes # (issue)

Type of change

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• Bug fix
• New feature
• Requires documentation updates

Testing

Please describe the test(s) that you added and ran to verify your changes.

Checklist

• I have read the contribution guide recently

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.69%. Comparing base (df3c882) to head (9d45a21).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #637   +/-   ##
=======================================
  Coverage   78.69%   78.69%           
=======================================
  Files           9        9           
  Lines        3835     3835           
=======================================
  Hits         3018     3018           
  Misses        817      817           

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