[clang] [TySan][Clang] Add clang flag to use tysan outlined instrumentation a… (PR #166170)

[Florian Hahn via cfe-commits]

https://github.com/fhahn commented:

@gbMattN did you already get a chance to verify the outlined instrumentation matches via `-fsanitize-type-verify-outlined-instrumentation` on a larger set of workloads?

Are you aware of any cases where the outlined insturmentation performs worse than the inline instrumentation?

If not, I think it would be better to due some due diligence testing using `-fsanitize-type-verify-outlined-instrumentation` and flip the default, instead of adding the plumbing to make it convenient to use

https://github.com/llvm/llvm-project/pull/166170