[clang] [CIR] Add .clang-tidy files for ClangIR specific coding style rules (PR #111417)

[David Olsen via cfe-commits]

https://github.com/dkolsen-pgi approved this pull request.

I am not familiar with how clang-tidy works.  (I expect that will have to change and I should start using it.)  So I can't meaningfully review this.


https://github.com/llvm/llvm-project/pull/111417