Migrate the last crates to edition 2024 (#10998)

Migrates the remaining crates to edition 2024. We like to stay on the
latest edition if possible. There is no functional changes, however some
code changes had to be done to accommodate the edition's breaking
changes.

Like the previous migration PRs, this is comprised of three commits:

* the first does the edition update and makes `cargo check`/`cargo
clippy` pass. we had to update bindgen to make its output [satisfy the
requirements of edition
2024](https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html)
* the second commit does a `cargo fmt` for the new style edition.
* the third commit reorders imports as a one-off change. As before, it
is entirely optional.

Part of #10918

libs/utils/src/sync/gate.rs

@@ -1,10 +1,6 @@
-use std::{
-    sync::{
-        atomic::{AtomicBool, Ordering},
-        Arc,
-    },
-    time::Duration,
-};
+use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::time::Duration;
 
 /// Gates are a concurrency helper, primarily used for implementing safe shutdown.
 ///

libs/utils/src/sync/heavier_once_cell.rs

@@ -1,7 +1,6 @@
-use std::sync::{
-    atomic::{AtomicUsize, Ordering},
-    Arc, Mutex, MutexGuard,
-};
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::sync::{Arc, Mutex, MutexGuard};
+
 use tokio::sync::Semaphore;
 
 /// Custom design like [`tokio::sync::OnceCell`] but using [`OwnedSemaphorePermit`] instead of
@@ -301,14 +300,13 @@ impl Drop for InitPermit {
 
 #[cfg(test)]
 mod tests {
+    use std::convert::Infallible;
+    use std::pin::{Pin, pin};
+    use std::time::Duration;
+
     use futures::Future;
 
     use super::*;
-    use std::{
-        convert::Infallible,
-        pin::{pin, Pin},
-        time::Duration,
-    };
 
     #[tokio::test]
     async fn many_initializers() {

libs/utils/src/sync/spsc_fold.rs

@@ -1,4 +1,5 @@
-use core::{future::poll_fn, task::Poll};
+use core::future::poll_fn;
+use core::task::Poll;
 use std::sync::{Arc, Mutex};
 
 use diatomic_waker::DiatomicWaker;