Detect multiple crate versions on method not found

When a type comes indirectly from one crate version but the imported trait comes from a separate crate version, the called method won't be found. We now show additional context:

```
error[E0599]: no method named `foo` found for struct `dep_2_reexport::Type` in the current scope
 --> multiple-dep-versions.rs:8:10
  |
8 |     Type.foo();
  |          ^^^ method not found in `Type`
  |
note: you have multiple different versions of crate `dependency` in your dependency graph
 --> multiple-dep-versions.rs:4:32
  |
4 | use dependency::{do_something, Trait};
  |                                ^^^^^ `dependency` imported here doesn't correspond to the right crate version
  |
 ::: ~/rust/build/x86_64-unknown-linux-gnu/test/run-make/crate-loading/rmake_out/multiple-dep-versions-1.rs:4:1
  |
4 | pub trait Trait {
  | --------------- this is the trait that was imported
  |
 ::: ~/rust/build/x86_64-unknown-linux-gnu/test/run-make/crate-loading/rmake_out/multiple-dep-versions-2.rs:4:1
  |
4 | pub trait Trait {
  | --------------- this is the trait that is needed
5 |     fn foo(&self);
  |        --- the method is available for `dep_2_reexport::Type` here
```

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