[llvm] [NaryReassociate] Teach NaryReassociate about UniformityAnalysis (PR #175167)

[Pankaj Dwivedi via llvm-commits]

PankajDwivedi-25 wrote:

@jayfoad patch: [[upstream-llvm/pull/198507](https://github.com/llvm/llvm-project/pull/198507)](https://github.com/llvm/llvm-project/pull/198507): [Reassociate] Use UniformityInfo to group uniform operands together, has been merged I don't know if we want this as the reassociate can only do basic reordering.

if we don't need this I will close this else if it not clear will make it draft. 

https://github.com/llvm/llvm-project/pull/175167