[InstCombine] Support min/max intrinsics in udiv->lshr fold

This complements the existing fold for selects. This fold is a bit
more conservative, requiring one-use. The other folds here should
probably also be subjected to a one-use restriction.

https://alive2.llvm.org/ce/z/Q9eCDU
https://alive2.llvm.org/ce/z/8YK2CJ