RustDoc: Search should "follow" trait generics for parameter and return tabs #56386
Description
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.
