[llvm] [LV] Support scalable interleave groups for factors 3, 5, 6 and 7 (PR #141865)

[Sam Tebbs via llvm-commits]

SamTebbs33 wrote:

FYI we might start looking into allowing interleaving up to a factor of 8 on AArch64, so what is currently dead code might not be so for very long after this is merged. It's not confirmed though.

https://github.com/llvm/llvm-project/pull/141865