No hint about implementing clone on type mismatch when cloning reference

[Noratrieb]

Given the following code: https://play.rust-lang.org/?version=nightly&mode=debug&edition=2021&gist=ebe1fe6ca75fd88cba9aa3a77cb625bf

struct NotClone;

fn main() {
    clone_thing(&NotClone);
}

fn clone_thing(nc: &NotClone) -> NotClone {
    nc.clone()
}

The current output is:

error[[E0308]](https://doc.rust-lang.org/nightly/error-index.html#E0308): mismatched types
 --> src/main.rs:8:5
  |
7 | fn clone_thing(nc: &NotClone) -> NotClone {
  |                                  -------- expected `NotClone` because of return type
8 |     nc.clone()
  |     ^^^^^^^^^^ expected struct `NotClone`, found `&NotClone`

For more information about this error, try `rustc --explain E0308`.
error: could not compile `playground` due to previous error

Ideally the output should look like:

error[[E0308]](https://doc.rust-lang.org/nightly/error-index.html#E0308): mismatched types
 --> src/main.rs:8:5
  |
7 | fn clone_thing(nc: &NotClone) -> NotClone {
  |                                  -------- expected `NotClone` because of return type
8 |     nc.clone()
  |     ^^^^^^^^^^ expected struct `NotClone`, found `&NotClone`
  | note: `NotClone` does not implement clone, consider implementing it.

For more information about this error, try `rustc --explain E0308`.
error: could not compile `playground` due to previous error

[compiler-errors]

Oh this one is a neat one, and I've seen it in the wild quite a few times.

@rustbot claim

[vintium]

I might suggest that the note be a little more detailed, something like:

note: there is no implementation of `Clone` for `NotClone`, so the implementation of `Clone` for `&T` was used. consider implementing `Clone` on `NotClone`.