Move "async move" a few characters to the left in cx.spawn() (#26758)

This is the core change:
https://github.com/zed-industries/zed/pull/26758/files#diff-044302c0d57147af17e68a0009fee3e8dcdfb4f32c27a915e70cfa80e987f765R1052

TODO:
- [x] Use AsyncFn instead of Fn() -> Future in GPUI spawn methods
- [x] Implement it in the whole app
- [x] Implement it in the debugger 
- [x] Glance at the RPC crate, and see if those box future methods can
be switched over. Answer: It can't directly, as you can't make an
AsyncFn* into a trait object. There's ways around that, but they're all
more complex than just keeping the code as is.
- [ ] Fix platform specific code

Release Notes:

- N/A

crates/debugger_ui/src/session/running/console.rs

@@ -213,8 +213,8 @@ impl Render for Console {
     fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
         let session = self.session.clone();
         let token = self.last_token;
-        self.update_output_task = cx.spawn_in(window, move |this, mut cx| async move {
-            _ = session.update_in(&mut cx, move |session, window, cx| {
+        self.update_output_task = cx.spawn_in(window, async move |this, cx| {
+            _ = session.update_in(cx, move |session, window, cx| {
                 let (output, last_processed_token) = session.output(token);
 
                 _ = this.update(cx, |this, cx| {
@@ -342,7 +342,7 @@ impl ConsoleQueryBarCompletionProvider {
 
         let query = buffer.read(cx).text();
 
-        cx.spawn(|_, cx| async move {
+        cx.spawn(async move |_, cx| {
             let matches = fuzzy::match_strings(
                 &string_matches,
                 &query,

crates/debugger_ui/src/session/running/module_list.rs

@@ -60,9 +60,9 @@ impl ModuleList {
     }
 
     fn open_module(&mut self, path: Arc<Path>, window: &mut Window, cx: &mut Context<Self>) {
-        cx.spawn_in(window, move |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let (worktree, relative_path) = this
-                .update(&mut cx, |this, cx| {
+                .update(cx, |this, cx| {
                     this.workspace.update(cx, |workspace, cx| {
                         workspace.project().update(cx, |this, cx| {
                             this.find_or_create_worktree(&path, false, cx)
@@ -72,7 +72,7 @@ impl ModuleList {
                 .await?;
 
             let buffer = this
-                .update(&mut cx, |this, cx| {
+                .update(cx, |this, cx| {
                     this.workspace.update(cx, |this, cx| {
                         this.project().update(cx, |this, cx| {
                             let worktree_id = worktree.read(cx).id();
@@ -88,7 +88,7 @@ impl ModuleList {
                 })??
                 .await?;
 
-            this.update_in(&mut cx, |this, window, cx| {
+            this.update_in(cx, |this, window, cx| {
                 this.workspace.update(cx, |workspace, cx| {
                     let project_path = buffer.read(cx).project_path(cx).ok_or_else(|| {
                         anyhow!("Could not select a stack frame for unnamed buffer")

crates/debugger_ui/src/session/running/stack_frame_list.rs

@@ -235,9 +235,9 @@ impl StackFrameList {
             return Task::ready(Err(anyhow!("Project path not found")));
         };
 
-        cx.spawn_in(window, move |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let (worktree, relative_path) = this
-                .update(&mut cx, |this, cx| {
+                .update(cx, |this, cx| {
                     this.workspace.update(cx, |workspace, cx| {
                         workspace.project().update(cx, |this, cx| {
                             this.find_or_create_worktree(&abs_path, false, cx)
@@ -246,7 +246,7 @@ impl StackFrameList {
                 })??
                 .await?;
             let buffer = this
-                .update(&mut cx, |this, cx| {
+                .update(cx, |this, cx| {
                     this.workspace.update(cx, |this, cx| {
                         this.project().update(cx, |this, cx| {
                             let worktree_id = worktree.read(cx).id();
@@ -261,10 +261,10 @@ impl StackFrameList {
                     })
                 })??
                 .await?;
-            let position = buffer.update(&mut cx, |this, _| {
+            let position = buffer.update(cx, |this, _| {
                 this.snapshot().anchor_after(PointUtf16::new(row, 0))
             })?;
-            this.update_in(&mut cx, |this, window, cx| {
+            this.update_in(cx, |this, window, cx| {
                 this.workspace.update(cx, |workspace, cx| {
                     let project_path = buffer.read(cx).project_path(cx).ok_or_else(|| {
                         anyhow!("Could not select a stack frame for unnamed buffer")
@@ -282,7 +282,7 @@ impl StackFrameList {
             })???
             .await?;
 
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 this.workspace.update(cx, |workspace, cx| {
                     let breakpoint_store = workspace.project().read(cx).breakpoint_store();