Getting several no_effect_underscore_binding lints on #[launch]

[ShayBox]

Description

I generally have clippy::pedantic set to warn, and trying to use the default example code.

The specific lints are:

* `clippy::no_effect_underscore_binding` (from pedantic)

* `clippy::uninlined_format_args` (from pedantic)

To Reproduce

The following code can be used with the latest version of rocket on a fresh cargo init.

#![warn(clippy::pedantic)]

#[macro_use]
extern crate rocket;

#[get("/<name>/<age>")]
fn hello(name: &str, age: u8) -> String {
    format!("Hello, {} year old named {}!", age, name)
}

#[launch]
fn rocket() -> _ {
    rocket::build().mount("/hello", routes![hello])
}

Switching to a static return type Rocket<Build> does not change the warnings.
I believe this is because the #[launch] macro uses many underscore bindings, without allow.

fn main() {
    let _ = ::rocket::async_main(
        {
            let ___rocket: ::rocket::Rocket<::rocket::Build> = {
                rocket::build()
                    .mount(
                        "/hello",
                        {
                            let ___vec: ::std::vec::Vec<::rocket::Route> = <[_]>::into_vec(
                                #[rustc_box]
                                ::alloc::boxed::Box::new([
                                    {
                                        let ___struct = hello {};
                                        let ___item: ::rocket::Route = ___struct.into_route();
                                        ___item
                                    },
                                ]),
                            );
                            ___vec
                        },
                    )
            };
            let ___rocket: ::rocket::Rocket<::rocket::Build> = ___rocket;
            ___rocket
        }
            .launch(),
    );
}

Expected Behavior

No unrelated lints to appear from within the launch derive.

Environment:

* OS Distribution and Kernel: Windows 11 23H2

* Rocket Version: 0.5.0

Based on a similar issue #2655

[SergioBenitez]

There are no longer there on master.