Fix clang-format workflow

[mcbarton]

Description

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

The clang format workflow is broken because it tries to get a git-clang-format by wgetting it. Git-clang-format is not used as far as I can tell from the workflow, so should be safe to just remove the 'Download git-clang-format' section of the workflow.

Fixes # (issue)

Type of change

Please tick all options which are relevant.

• 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

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.17%. Comparing base (a901f57) to head (88575fa).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #494   +/-   ##
=======================================
  Coverage   71.17%   71.17%           
=======================================
  Files           9        9           
  Lines        3552     3552           
=======================================
  Hits         2528     2528           
  Misses       1024     1024           

Files with missing lines	Coverage Δ
lib/Interpreter/Compatibility.h	88.28% <ø> (ø)

Files with missing lines	Coverage Δ
lib/Interpreter/Compatibility.h	88.28% <ø> (ø)