Reintroduce ProMotion support (#7347)

This re-introduces the changes of #7305 but this time we create a
display link using the `NSScreen` associated with the window. We're
hoping we'll get these frame requests more reliably, and this seems
supported by the fact that awakening my laptop restores the frame
requests.

Release Notes:

- See #7305.

Co-authored-by: Nathan <nathan@zed.dev>

crates/gpui/src/platform.rs

@@ -175,7 +175,6 @@ pub(crate) trait PlatformWindow: HasWindowHandle + HasDisplayHandle {
     fn on_close(&self, callback: Box<dyn FnOnce()>);
     fn on_appearance_changed(&self, callback: Box<dyn FnMut()>);
     fn is_topmost_for_position(&self, position: Point<Pixels>) -> bool;
-    fn invalidate(&self);
     fn draw(&self, scene: &Scene);
 
     fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas>;