[llvm] [OpenMP] Move KernelInfoState and AAKernelInfo to OpenMPOpt.h (PR #71878)

[Johannes Doerfert via llvm-commits]

jdoerfert wrote:

> > To update that behavior, we need to accumulate the memory effects of all reaching kernels into the memory effect of the barrier.
> 
> Can you explain what you mean by updating the behavior? Since you're not marking the patch as NFC I am guessing you are also performing a functional change to the code, you're not just relocating the classes.

This commit is NFC, as far as I can tell. The commit message is a justification for this commit, so why do we need to move this around (make it public).

https://github.com/llvm/llvm-project/pull/71878