Rollup merge of #137383 - folkertdev:stabilize-unsigned-is-multiple-of, r=Noratrieb

stabilize `unsigned_is_multiple_of`

tracking issue: rust-lang/rust#128101
fcp completed in: rust-lang/rust#128101 (comment)

### Public API

A version of this for all the unsigned types

```rust
fn is_multiple_of(lhs: u64, rhs: u64) -> bool {
    match rhs {
        // prevent division by zero
        0 => lhs == 0,
        _ => lhs % rhs == 0,
    }
}
```

Author: matthiaskrgr