[llvm] [LV]Set tailfolding styles before computing feasible max VF. (PR #91403)

[Florian Hahn via llvm-commits]

fhahn wrote:

Do you think splitting up checking if tail-folding is possible from collecting masked ops would help simplify this change? There's https://github.com/llvm/llvm-project/pull/77612 which I could update if it would help

https://github.com/llvm/llvm-project/pull/91403