[llvm] [TySan] A Type Sanitizer (LLVM) (PR #76259)

[Sam James via llvm-commits]

thesamesam wrote:

FWIW, having the 2 parts in would make it easier for us to test it before compiler-rt is merged (rather than having to rebase and apply the 3 parts individually to each component, as we build LLVM/Clang/compiler-rt separately), but I don't feel strongly at all either.

https://github.com/llvm/llvm-project/pull/76259