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

[Thorsten Schütt via llvm-commits]

tschuett wrote:

1. Feel free to extend https://github.com/llvm/llvm-project/issues/92309
2. We combine select(cmp) into min/max.
3. We combine select into binary operators.

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