`goto_definition` should not navigate to the local variable defined in macros.

[xffxff]

As @matklad mentions here，goto_definition should not navigate to the local variable defined in macros.

macro_rules! m {
    () => {
        let x = 2;
    };
}

#[test]
fn test_hygiene() {
    let x = 1;
    m!();
    println!("{}", x)
}

When I put the cursor on the x in println!, use goto_definition, it will navigate to macro call m!().
Similarly, highlight_related should not highlight m! when I put the cursor on the x.