Nonoptimal `CmpLt`

[Melirius]

https://github.com/Lokathor/wide/blob/729877b9a5458efb066c2731661ef0723971fba0/src/i32x8_.rs#L275

Much faster will be just reverse CmpGt

        Self { avx2: cmp_gt_mask_i32_m256i(rhs.avx2, self.avx2) }