intra-doc-resolution fails to link in re-exported types that don't match original module structure

[Nemo157]

Given a base crate

// bar/src/lib.rs
pub trait Foo {
    /// [`Bar`] [`Baz`]
    fn foo();
}

pub trait Bar {
}

pub trait Baz {
}

and a crate that uses that and re-exports types from it in a different structure

// foo/src/lib.rs
pub mod bar {
    pub use ::bar::Bar;
}

pub use ::bar::{Foo, Baz};

The links in the re-exported types only work when the module structure matches between the two crates (in this case for Baz but not for Bar)

Rustdoc correctly warns that it can't resolve the link, but this seems like a primary usecase of the feature to allow facade crates to have correctly linked docs when they rearrange types from underlying crates.

warning: `[Bar]` cannot be resolved, ignoring it...
 --> /private/var/folders/0p/5yvmrvhj5w3_vy1y8x7dvk7m0000gn/T/tmp.lUuznfwf/foo/bar/src/lib.rs:2:10
  |
2 |     /// [`Bar`] [`Baz`]
  |          ^^^^^ cannot be resolved, ignoring
  |

[Nemo157]

@rustbot modify labels to A-intra-doc-links T-rustdoc.

[Manishearth]

Filed #65983 with more information on this so someone can pick it up if they want to