### Godot version

4.0beta17

### System information

Linux Mint 21.1

### Issue description

When editing animations for the **frame** property of **Sprite2D**, the preview image does not respect the **region_rect** specified in the Sprite2D's properties.

Godot 4.0 (tested with alpha1 to beta17)
![Screenshot from 2023-02-05 21-19-29](https://user-images.githubusercontent.com/2348534/216868394-45a9dc42-ce4b-4b11-82cb-4491aea46d9b.png)

Godot 3.5
![Screenshot from 2023-02-05 21-19-43](https://user-images.githubusercontent.com/2348534/216868543-cff6eb60-a431-4138-8fa6-5c30a54de0e1.png)

As can be seen in the second screenshot, the region rect is applied to the key preview image in Godot 3.5, but is ignored in Godot 4.0.


### Steps to reproduce

Steps:

1. Set a region rect on a Sprite2D node
2. Add Sprite2D.frame as a track to an AnimationPlayer
3. Insert key
4. Key preview does not take region rect into account

### Minimal reproduction project

[MRP.zip](https://github.com/godotengine/godot/files/10637055/MRP.zip)

id = p_object->get_instance_id();
}
AnimationTrackEditTypeAnimation::AnimationTrackEditTypeAnimation() {
}
AnimationTrackEdit *AnimationTrackEditDefaultPlugin::create_value_track_edit(Object *p_object, Variant::Type p_type, const String &p_property, PropertyHint p_hint, const String &p_hint_string, int p_usage) {
	if (p_property == "playing" && (p_object->is_class("AudioStreamPlayer") || p_object->is_class("AudioStreamPlayer2D") || p_object->is_class("AudioStreamPlayer3D"))) {
		AnimationTrackEditAudio *audio = memnew(AnimationTrackEditAudio);
		audio->set_node(p_object);
		return audio;
	}
	if (p_property == "frame" && (p_object->is_class("Sprite2D") || p_object->is_class("Sprite3D") || p_object->is_class("AnimatedSprite2D") || p_object->is_class("AnimatedSprite3D"))) {
		AnimationTrackEditSpriteFrame *sprite = memnew(AnimationTrackEditSpriteFrame);
		sprite->set_node(p_object);
		return sprite;
	}
	if (p_property == "frame_coords" && (p_object->is_class("Sprite2D") || p_object->is_class("Sprite3D"))) {
		AnimationTrackEditSpriteFrame *sprite = memnew(AnimationTrackEditSpriteFrame);