[llvm] [IR][DAG] Add support for `nneg` flag with `uitofp` (PR #86141)

[via llvm-commits]

goldsteinn wrote:

> > I think the IR and codegen changes should be split to separate patches. Also missing the GlobalIsel handling
> 
> Okay, this change is IR only now.

Realize still have logic in `SelectionDAGBuilder`. Do you want me to split that as well?

https://github.com/llvm/llvm-project/pull/86141