[clang] [compiler-rt] [compiler-rt] Realtime Sanitizer: Introduce Realtime Sanitizer (RTSan) backend (PR #92460)

[Vitaly Buka via llvm-commits]

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

LGTM. but I suggest to rework test into LIT, before or either commit.

https://github.com/llvm/llvm-project/pull/92460