Rollup merge of #142043 - estebank:const-suggestion, r=wesleywiser

Verbose suggestion to make param `const`

```
error[E0747]: type provided when a constant was expected
  --> $DIR/invalid-const-arguments.rs:10:19
   |
LL | impl<N> Foo for B<N> {}
   |                   ^
   |
help: consider changing this type parameter to a const parameter
   |
LL - impl<N> Foo for B<N> {}
LL + impl<const N: u8> Foo for B<N> {}
   |
```

Part of rust-lang/rust#141973.

Author: GuillaumeGomez