Reduce display_map snapshot creation (#39354)

Re-applies https://github.com/zed-industries/zed/pull/30840

This PR re-applies the initial
[PR](https://github.com/zed-industries/zed/pull/30840). As it was closed
because it was hard to land, because of the many conflicts. This PR
re-applies the changes for it.

In several cases we were creating multiple display_map
snapshots within the same root-level function call.
Creating a display_map snapshot is quite slow, and in some
cases we were creating the snapshot multiple times.

Release Notes:

- N/A

crates/vim/src/visual.rs

@@ -747,7 +747,8 @@ impl Vim {
         self.stop_recording(cx);
         self.update_editor(cx, |_, editor, cx| {
             editor.transact(window, cx, |editor, window, cx| {
-                let (display_map, selections) = editor.selections.all_adjusted_display(cx);
+                let display_map = editor.display_snapshot(cx);
+                let selections = editor.selections.all_adjusted_display(&display_map);
 
                 // Selections are biased right at the start. So we need to store
                 // anchors that are biased left so that we can restore the selections
@@ -858,7 +859,9 @@ impl Vim {
             });
         }
         self.update_editor(cx, |_, editor, cx| {
-            let latest = editor.selections.newest::<usize>(cx);
+            let latest = editor
+                .selections
+                .newest::<usize>(&editor.display_snapshot(cx));
             start_selection = latest.start;
             end_selection = latest.end;
         });
@@ -879,7 +882,9 @@ impl Vim {
             return;
         }
         self.update_editor(cx, |_, editor, cx| {
-            let latest = editor.selections.newest::<usize>(cx);
+            let latest = editor
+                .selections
+                .newest::<usize>(&editor.display_snapshot(cx));
             if vim_is_normal {
                 start_selection = latest.start;
                 end_selection = latest.end;