Install LLVM and Clang

Version updated for KyleMayes/install-llvm-action to version v2.0.1.

• This action is used across all versions by 2,414 repositories.

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Release notes

Fixes

• Fixed exact LLVM and Clang versions (e.g., 17.0.6) causing the action to fail
• Fixed LLVM and Clang executables failing to run on ARM64 macOS runners

• KyleMayes
• GitHub Actions