[llvm] [KernelInfo] Implement new LLVM IR pass for GPU code analysis (PR #102944)

[Joel E. Denny via llvm-commits]

jdenny-ornl wrote:

> > Can you put an rst file to https://github.com/llvm/llvm-project/tree/main/llvm/docs instead of hiding everything in a header?
> 
> It's in `llvm/docs/KernelInfo.rst`. Any suggestions on what other docs should link to it?

I linked it from Passes.rst.  I'm fine to move it if people think that's not the best place.

https://github.com/llvm/llvm-project/pull/102944