Fix pub in enum variant field for no_such_field

[A4-Tacks]

Fixes #21204

Example

//- /main.rs
mod foo;

fn main() {
    foo::Foo::Variant { bar: 3, $0baz: false};
}
//- /foo.rs
pub enum Foo {
    Variant {
        bar: i32
    }
}

Before this PR

pub enum Foo {
    Variant {
        bar: i32,
        pub(crate) baz: bool
    }
}

After this PR

pub enum Foo {
    Variant {
        bar: i32,
        baz: bool
    }
}