### Godot version

v4.0.beta17.official [c40020513]

### System information

macOS 13.0.1

### Issue description

When a `Control` node is over a `SubViewportContainer` (with a `SubViewport` as a child), both in Full Rect anchors, asking for the get_viewport().get_mouse_position() from a scene inside the `SubViewport` returns (0, 0) as the position of the mouse.

This wasn't happening in at least Beta 15. I was getting the mouse position without any problems before Beta 17. I didn't try Beta 16.

### Steps to reproduce

1. Create a `Control` node
2. Add two children: A `SubViewportContainer` and a `Control` node
3. Put both in Full Rect anchors so the `Control` node (child) is covering the `SubViewportContainer`
4. Ask for the get_viewport().get_mouse_position() from inside a scene of the `SubViewport`

As you can see in this screenshot: asking for the mouse position from inside the `Node2D` script always returns (0, 0).

<img width="1533" alt="SubViewportContainerIssue" src="https://user-images.githubusercontent.com/91340577/217051768-d9c2e8ad-40ca-4c6d-bb98-f6a7c9c6081f.png">

Only If the `Control` (child) mouse filtering is set to _Ignore_ you can get the mouse position. But with that you are losing the mouse inputs from that `Control` node.

You can find the setup of these nodes in the MRP.


### Minimal reproduction project

Run the main scene (control.tscn) and move the mouse around the screen. Look for the print in the Output tab.

[SubViewportMousePositionIssue.zip](https://github.com/godotengine/godot/files/10667894/SubViewportMousePositionIssue.zip)
return window_transform * stretch_transform * global_canvas_transform;
}
Transform2D Window::get_screen_transform() const {
	Transform2D embedder_transform;
	if (_get_embedder()) {
		embedder_transform.translate_local(get_position());
		embedder_transform = _get_embedder()->get_screen_transform() * embedder_transform;
	}
	return embedder_transform * get_final_transform();
}
Transform2D Window::get_popup_base_transform() const {
	if (is_embedding_subwindows()) {
		return Transform2D();
	}
	Transform2D popup_base_transform;
	popup_base_transform.set_origin(get_position());
	popup_base_transform *= get_final_transform();
	if (_get_embedder()) {
		return _get_embedder()->get_popup_base_transform() * popup_base_transform;
	}
	return popup_base_transform;
}
void Window::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_title", "title"), &Window::set_title);
	ClassDB::bind_method(D_METHOD("get_title"), &Window::get_title);
	ClassDB::bind_method(D_METHOD("set_initial_position", "initial_position"), &Window::set_initial_position);
	ClassDB::bind_method(D_METHOD("get_initial_position"), &Window::get_initial_position);
	ClassDB::bind_method(D_METHOD("set_current_screen", "index"), &Window::set_current_screen);
	ClassDB::bind_method(D_METHOD("get_current_screen"), &Window::get_current_screen);