chore: Bump Rust edition to 2024 (#27800)

Follow-up to https://github.com/zed-industries/zed/pull/27791

Release Notes:

- N/A

crates/collab/src/tests/randomized_test_helpers.rs

@@ -9,7 +9,7 @@ use gpui::{BackgroundExecutor, Task, TestAppContext};
 use parking_lot::Mutex;
 use rand::prelude::*;
 use rpc::RECEIVE_TIMEOUT;
-use serde::{de::DeserializeOwned, Deserialize, Serialize};
+use serde::{Deserialize, Serialize, de::DeserializeOwned};
 use settings::SettingsStore;
 use std::sync::OnceLock;
 use std::{
@@ -17,8 +17,8 @@ use std::{
     path::PathBuf,
     rc::Rc,
     sync::{
-        atomic::{AtomicBool, Ordering::SeqCst},
         Arc,
+        atomic::{AtomicBool, Ordering::SeqCst},
     },
 };