rustdoc still doesn't handle renames in reexports correctly

[kennytm]

Test case:

mod internal {
    pub struct BadName;
    impl BadName {
        pub fn f(&self) {}
    }
}
pub use internal::BadName as GoodName;

Running rustdoc a.rs, it produces this page:

Note that the impl still refers to the struct as BadName. The fix for #34473 is not enough.

Real world example:

• https://docs.rs/handlebars/6.3.2/handlebars/struct.Handlebars.html — the struct is exported as Handlebars but the content says impl Registry. The method new() also returns Registry.
• https://docs.rs/handlebars/6.3.2/handlebars/trait.HelperDef.html — the parameter involving &'reg refers to Registry, although it correctly links to struct.Handlebars.html.

[Enselic]

Triage: Still reproduces:

[lolbinarycat]

triage: still broken