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/kernels/mod.rs

@@ -79,7 +79,7 @@ pub fn python_env_kernel_specifications(
     project: &Entity<Project>,
     worktree_id: WorktreeId,
     cx: &mut App,
-) -> impl Future<Output = Result<Vec<KernelSpecification>>> {
+) -> impl Future<Output = Result<Vec<KernelSpecification>>> + use<> {
     let python_language = LanguageName::new("Python");
     let toolchains = project.read(cx).available_toolchains(
         ProjectPath {

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();
 

crates/repl/src/outputs.rs

@@ -205,11 +205,10 @@ impl Output {
 
     pub fn render(
         &self,
-
         workspace: WeakEntity<Workspace>,
         window: &mut Window,
         cx: &mut Context<ExecutionView>,
-    ) -> impl IntoElement {
+    ) -> impl IntoElement + use<> {
         let content = match self {
             Self::Plain { content, .. } => Some(content.clone().into_any_element()),
             Self::Markdown { content, .. } => Some(content.clone().into_any_element()),