Fix missing other assoc items for generate_blanket_trait_impl

[A4-Tacks]

• And migrate edit_in_place::Indent to edit::AstNodeEdit,
  because edit_in_place use ted

Example

trait $0Foo<T: Send> {
    type X: Sync;

    fn foo(&self, x: Self::X) -> T;

    fn print_foo(&self) {
        println!("{}", self.foo());
    }
}

Before this PR

impl<T: Send, T1: ?Sized> Foo<T> for $0T1 {
    fn foo(&self, x: Self::X) -> T {
        todo!()
    }
}

After this PR

impl<T: Send, T1: ?Sized> Foo<T> for $0T1 {
    type X: Sync;

    fn foo(&self, x: Self::X) -> T {
        todo!()
    }
}