RustDoc: Search should "follow" trait generics for parameter and return tabs

[akatechis]

Repost from rust-lang/docs.rs#266

If I search the name of a trait, it would be nice to see matches for parameter and return tabs for functions that include that trait as a trait bound.

In the screenshot below, State is a trait of the kiss3d crate, and the render_with_state shown has <S: State> trait bounds on it, so it would be nice to see that function under the "In parameters" tab as well. Ditto for functions where the trait object is returned.

[GuillaumeGomez]

It'll be working once #59004 is merged.

[kadiwa4]

It is fixed indeed.

[GuillaumeGomez]

Closing then.