[llvm] [Attributor] Enable AAAddressSpace for OpenMPOpt (PR #65544)

[Shilei Tian via llvm-commits]

shiltian wrote:

> Will this have an impact on runtime of OpenMPOpt and if so, do we already have an idea of how large that is?

It will not impact the runtime too much because the AA (for now) only depends on `AAUnderlyingObjects`, which I believe in most cases have already been created regardless.

https://github.com/llvm/llvm-project/pull/65544