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

[Egor Pasko via llvm-commits]

pasko wrote:

Hello @aeubanks,

I added a couple of new tests as you suggested. I do not have good intuition on their coverage. I think I will need to add a few cases, like always_inline or slightly more complicated code. Can you please take a look at the general structure? Does it roughly match your proposal above?

I would appreciate if you leave comments with specific suggestions if they come to your mind immediately.

This is still a WIP, but I thought that this PR would converge faster if I publish the current state now. A few trivial changes are still needed to tests, and I did not remove Clang tests yet.

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