ci: Upload clang-tidy git diff

[mathbunnyru]

High Level Overview of Change

This allows the Clang Tidy changes to be downloaded and applied locally easily.

Context of Change

API Impact

• Public API: New feature (new methods and/or new fields)
• Public API: Breaking change (in general, breaking changes should only impact the next api_version)
• libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
• Peer protocol change (must be backward compatible or bump the peer protocol version)

[godexsoft]

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.8%. Comparing base (ea02312) to head (7f11233).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #6983     +/-   ##
=========================================
- Coverage     81.8%   81.8%   -0.0%     
=========================================
  Files         1010    1010             
  Lines        76162   76162             
  Branches      7529    7532      +3     
=========================================
- Hits         62307   62295     -12     
- Misses       13855   13867     +12     

see 6 files with indirect coverage changes

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