[clang] [sanitizer] Parse weighted sanitizer args and -fno-sanitize-top-hot (PR #121619)

[Vitaly Buka via cfe-commits]

================
@@ -3615,9 +3616,12 @@ void CodeGenFunction::EmitCheck(
 
----------------
vitalybuka wrote:

maybe we can keep the patch Driver only, because we need:
passing fractions array into LLVM passes: ubsan and hwasan


https://github.com/llvm/llvm-project/pull/121619