[llvm] [AArch64][LV][SLP] Vectorizers use getFRemInstrCost for frem costs (PR #82488)

[Paschalis Mpeis via llvm-commits]

paschalis-mpeis wrote:

forced-push to rebase to main (parent PR #80423 merged, so this one is no longer stacked).

This change, matches functionality on both LoopVectorizer and SLPVectorizer.

What do you think about the latest change?
Thank you all for the valuable feedback so far.

https://github.com/llvm/llvm-project/pull/82488