[llvm] GlobalISel: Use G_UADDE when narrowing G_UMULH (PR #97194)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> Did you mean `the carry in to G_UADDO`?

No. Previously this was doing add 0/1 for overflow to G_UADDO, and now it uses the carry-in input of G_UADDE 

https://github.com/llvm/llvm-project/pull/97194