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/state.rs

@@ -863,7 +863,9 @@ impl VimGlobals {
                 }
             }
             '%' => editor.and_then(|editor| {
-                let selection = editor.selections.newest::<Point>(cx);
+                let selection = editor
+                    .selections
+                    .newest::<Point>(&editor.display_snapshot(cx));
                 if let Some((_, buffer, _)) = editor
                     .buffer()
                     .read(cx)