[clang] [llvm] wip: Move instrumentation passes (PR #92171)

[Egor Pasko via llvm-commits]

pasko wrote:

@aeubanks Thanks for the first set of comments. I think I addressed them all and checked that instrumentation is still WAI in my ThinkLTO example. I did not run/update tests yet, this is TBD. Another round of review pre-tests would be appreciated.

https://github.com/llvm/llvm-project/pull/92171