[llvm-branch-commits] [clang-tools-extra] [clang-tidy] Normalize windows line filter paths (#217038) (PR #221500)

[Baranov Victor via llvm-branch-commits]

https://github.com/vbvictor approved this pull request.

Fine from me if we want to get this fix one release earlier.

https://github.com/llvm/llvm-project/pull/221500