[llvm] [GlobalISel]: Simplify udiv lowering by determining known zeros (PR #89678)

[Yingchi Long via llvm-commits]

inclyc wrote:

> Failed tests and I reran them to ensure everything is good.

A simple way to do such things is to utilize `git commit --fixup`, and use `git rebase -i main --autosquash`. (The rebasing should be performed right after the change is ready to be merged, and perform only once.)

https://github.com/llvm/llvm-project/pull/89678