chore: Prepare for Rust edition bump to 2024 (without autofix) (#27791)

Successor to #27779 - in this PR I've applied changes manually, without
futzing with if let lifetimes at all.

Release Notes:

- N/A

crates/repl/src/notebook/notebook_ui.rs

@@ -642,7 +642,7 @@ impl NotebookItem {
                 .and_then(|spec| spec.language.clone()))
     }
 
-    pub fn notebook_language(&self) -> impl Future<Output = Option<Arc<Language>>> {
+    pub fn notebook_language(&self) -> impl Future<Output = Option<Arc<Language>>> + use<> {
         let language_name = self.language_name();
         let languages = self.languages.clone();