### Godot version

v4.0.1.stable.official [cacf49999]

### System information

Windows 10

### Issue description

If you use Sprite2D with a regular CompressedTexture and set a Region on it, then use a Sprite2D with a CanvasTexture and a different texture in the diffuse, and try to set a Region, the Region Editor display will show the texture from the first sprite2D node. I would expect it to show the diffuse texture from the current Sprite2D.
![image](https://user-images.githubusercontent.com/7292421/231493673-4eb152e0-81ed-4248-8465-71242c291cd2.png)
![image](https://user-images.githubusercontent.com/7292421/231493749-6173993b-e77c-4899-961e-9a055c07e351.png)




### Steps to reproduce

Make a sprite2D node
add a texture to it 
set Region to Enabled
click Edit Region under 'Region'
set any region

Make another sprite2D node
add a CanvasTexture to it
add a different texture to the Diffuse part
set Region to Enabled
click Edit Region under 'Region'
see wrong texture

### Minimal reproduction project

[RegionEditorBug.zip](https://github.com/godotengine/godot/files/11212626/RegionEditorBug.zip)

if (atlas.is_valid()) {
		return atlas->get_rid();
	}
	return RID();
}
bool AtlasTexture::has_alpha() const {
	if (atlas.is_valid()) {
		return atlas->has_alpha();
	}
	return false;
}
void AtlasTexture::set_atlas(const Ref<Texture2D> &p_atlas) {
	ERR_FAIL_COND(p_atlas == this);
	if (atlas == p_atlas) {
		return;
	}
	
	if (Ref<AtlasTexture>(atlas).is_valid()) {
		atlas->disconnect_changed(callable_mp((Resource *)this, &AtlasTexture::emit_changed));
	}
	atlas = p_atlas;
	if (Ref<AtlasTexture>(atlas).is_valid()) {
		atlas->connect_changed(callable_mp((Resource *)this, &AtlasTexture::emit_changed));
	}
	emit_changed();
}
Ref<Texture2D> AtlasTexture::get_atlas() const {