[clang] [llvm] [AMDGPU] Add intrinsics for v_[pk]_add_{min|max}_* instructions (PR #164731)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> > Please revert, these should not be intrinsics. This is a trivial pattern
> 
> No, this is not a trivial pattern. I will change the pattern instead. The documentation was in fact incorrect and the intermediate add is not an add, but rather uaddsat or saddsat.

Which is still a trivial pattern 

https://github.com/llvm/llvm-project/pull/164731