editor: Shrink DisplayMapSnapshot from 824 to 256 bytes (#39568)

We have unnecessary clones for the fields here as most of the snapshots
contain the others hierarchically.

Release Notes:

- N/A *or* Added/Fixed/Improved ...

crates/editor/src/items.rs

@@ -1539,7 +1539,8 @@ impl SearchableItem for Editor {
 
     fn query_suggestion(&mut self, window: &mut Window, cx: &mut Context<Self>) -> String {
         let setting = EditorSettings::get_global(cx).seed_search_query_from_cursor;
-        let snapshot = &self.snapshot(window, cx).buffer_snapshot;
+        let snapshot = self.snapshot(window, cx);
+        let snapshot = snapshot.buffer_snapshot();
         let selection = self.selections.newest_adjusted(cx);
 
         match setting {