Auto merge of #93455 - asquared31415:vec-zero-opts, r=thomcc

Auto merge of #93455 - asquared31415:vec-zero-opts, r=thomcc

Implement internal `IsZero` for Wrapping and Saturating for `Vec` optimizations

This implements the `IsZero` trait for the `Wrapping` and `Saturating` types so that users of these types can get the improved performance from the specialization of creating a `Vec` from a single element repeated when it has a zero bit pattern (example `vec![0_i32; 500]`, or after this PR `vec![Wrapping(0_i32); 500]`)

CC #60978