[New mingw-w64-llvm version] llvm: split a new package llvm-tools (#24287)

[github-actions]

llvm: split a new package llvm-tools (#24287)

This is to minimize toolchain installation size on clang* environments.

msys2/MINGW-packages@bcd8653

[rimrul]

I think we can pick this up with the next llvm update.