[llvm] Simplify `(a % b) lt/ge (b-1)` into `(a % b) eq/ne (b-1)` (PR #72504)

[via llvm-commits]

elhewaty wrote:

@dtcxzyw should I open another PR with only the tests updated or with the whole patch?

https://github.com/llvm/llvm-project/pull/72504