Warning users when lacking a Clone impl due to imperfect derive

For reference, the current output is

error[E0277]: the trait bound `Foo<DefaultNotClone>: Clone` is not satisfied
  --> src/main.rs:10:9
   |
10 |     bar(Foo::<DefaultNotClone>::default());
   |     --- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Clone` is not implemented for `Foo<DefaultNotClone>`
   |     |
   |     required by a bound introduced by this call
   |
note: required for `Foo<DefaultNotClone>` to implement `Clone`
  --> src/main.rs:2:8
   |
 1 | #[derive(Default, Clone)]
   |                   ----- in this derive macro expansion
 2 | struct Foo<T>(std::marker::PhantomData<T>);
   |        ^^^ - type parameter would need to implement `Clone`
   = help: consider manually implementing `Clone` to avoid undesired bounds
note: required by a bound in `bar`
  --> src/main.rs:7:11
   |
 7 | fn bar<T: Clone>(_: T) {}
   |           ^^^^^ required by this bound in `bar`
help: consider borrowing here
   |
10 |     bar(&Foo::<DefaultNotClone>::default());
   |         +