Simplify the zip_mut_with fallback case for one-dimensional arrays
Simplify the zip_mut_with fallback case for one-dimensional arrays

This reduces bloat by using simpler code for 1D arrays in the
non-contiguous fallback branch of .zip_mut_with.

Pireax/rust-ndarray,SuperFluffy/rust-ndarray,Pireax/rust-ndarray,SuperFluffy/rust-ndarray