[llvm] [LoopPeel] Remove known trip count restriction when peeling last. (PR #140792)

[Florian Hahn via llvm-commits]

fhahn wrote:

Recommitted in f98bdd94e61721ebe11108956e63510692db34b2, with skipping loops where the latch exit is controlled by a pointer IV which caused the crash

https://github.com/llvm/llvm-project/pull/140792