cx.background_executor().spawn(...) -> cx.background_spawn(...) (#25103)

Done automatically with

> ast-grep -p '$A.background_executor().spawn($B)' -r
'$A.background_spawn($B)' --update-all --globs "\!crates/gpui"

Followed by:

* `cargo fmt`
* Unexpected need to remove some trailing whitespace.
* Manually adding imports of `gpui::{AppContext as _}` which provides
`background_spawn`
* Added `AppContext as _` to existing use of `AppContext`

Release Notes:

- N/A

crates/terminal/src/terminal.rs

@@ -58,9 +58,9 @@ use std::{
 use thiserror::Error;
 
 use gpui::{
-    actions, black, px, AnyWindowHandle, App, Bounds, ClipboardItem, Context, EventEmitter, Hsla,
-    Keystroke, Modifiers, MouseButton, MouseDownEvent, MouseMoveEvent, MouseUpEvent, Pixels, Point,
-    Rgba, ScrollWheelEvent, SharedString, Size, Task, TouchPhase,
+    actions, black, px, AnyWindowHandle, App, AppContext as _, Bounds, ClipboardItem, Context,
+    EventEmitter, Hsla, Keystroke, Modifiers, MouseButton, MouseDownEvent, MouseMoveEvent,
+    MouseUpEvent, Pixels, Point, Rgba, ScrollWheelEvent, SharedString, Size, Task, TouchPhase,
 };
 
 use crate::mappings::{colors::to_alac_rgb, keys::to_esc_str};
@@ -1633,7 +1633,7 @@ impl Terminal {
         cx: &Context<Self>,
     ) -> Task<Vec<RangeInclusive<AlacPoint>>> {
         let term = self.term.clone();
-        cx.background_executor().spawn(async move {
+        cx.background_spawn(async move {
             let term = term.lock();
 
             all_search_matches(&term, &mut searcher).collect()