[compiler-rt] [llvm] [msan] Add experimental '-mllvm -msan-embed-faulting-instruction' and MSAN_OPTIONS=print_faulting_instruction (PR #136539)

[Florian Mayer via llvm-commits]

fmayer wrote:

LGTM from my side, leaving it to Vitaly and you to figure out.

https://github.com/llvm/llvm-project/pull/136539