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> {}
   |
```

Author: estebank

compiler/rustc_hir_analysis/src/hir_ty_lowering/generics.rs

@@ -73,7 +73,7 @@ fn generic_arg_mismatch_err(
                     let param_name = tcx.hir_ty_param_name(param_local_id);
                     let param_type = tcx.type_of(param.def_id).instantiate_identity();
                     if param_type.is_suggestable(tcx, false) {
-                        err.span_suggestion(
+                        err.span_suggestion_verbose(
                             tcx.def_span(src_def_id),
                             "consider changing this type parameter to a const parameter",
                             format!("const {param_name}: {param_type}"),

tests/ui/const-generics/early/invalid-const-arguments.stderr

@@ -51,9 +51,13 @@ 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: `const N: u8`
+   |                   ^
+   |
+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> {}
+   |
 
 error[E0747]: unresolved item provided when a constant was expected
   --> $DIR/invalid-const-arguments.rs:14:32

tests/ui/const-generics/kind_mismatch.stderr

@@ -2,17 +2,25 @@ error[E0747]: type provided when a constant was expected
   --> $DIR/kind_mismatch.rs:11:38
    |
 LL | impl<K> ContainsKey<K> for KeyHolder<K> {}
-   |      -                               ^
-   |      |
-   |      help: consider changing this type parameter to a const parameter: `const K: u8`
+   |                                      ^
+   |
+help: consider changing this type parameter to a const parameter
+   |
+LL - impl<K> ContainsKey<K> for KeyHolder<K> {}
+LL + impl<const K: u8> ContainsKey<K> for KeyHolder<K> {}
+   |
 
 error[E0747]: type provided when a constant was expected
   --> $DIR/kind_mismatch.rs:11:21
    |
 LL | impl<K> ContainsKey<K> for KeyHolder<K> {}
-   |      -              ^
-   |      |
-   |      help: consider changing this type parameter to a const parameter: `const K: u8`
+   |                     ^
+   |
+help: consider changing this type parameter to a const parameter
+   |
+LL - impl<K> ContainsKey<K> for KeyHolder<K> {}
+LL + impl<const K: u8> ContainsKey<K> for KeyHolder<K> {}
+   |
 
 error: aborting due to 2 previous errors