[llvm] [InstCombine] Fix fail to fold (A >> C1) Pred C2 if shr is used multple times #83430 (PR #83563)

[Amara Emerson via llvm-commits]

aemerson wrote:

Absolutely do not simply remove this oneuse check, if you break the minmax tests at all then this can't proceed.

https://github.com/llvm/llvm-project/pull/83563