[llvm] [LoopVectorize] Enable hoisting of runtime checks by default (PR #71538)

[Florian Hahn via llvm-commits]

fhahn wrote:

There's one internal benchmark where there may be a ~2% regression with this patch (and extra vectorizer passes enabled).  I'll confirm tomorrow if this is actually caused by the patch or noise only

https://github.com/llvm/llvm-project/pull/71538