### 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 sdf_scale;
}
Transform2D Viewport::get_screen_transform() const {
	return get_final_transform();
}
void Viewport::set_canvas_cull_mask(uint32_t p_canvas_cull_mask) {
	canvas_cull_mask = p_canvas_cull_mask;
	RenderingServer::get_singleton()->viewport_set_canvas_cull_mask(viewport, canvas_cull_mask);
}
uint32_t Viewport::get_canvas_cull_mask() const {
	return canvas_cull_mask;
}
void Viewport::set_canvas_cull_mask_bit(uint32_t p_layer, bool p_enable) {
	ERR_FAIL_UNSIGNED_INDEX(p_layer, 32);
	if (p_enable) {
		set_canvas_cull_mask(canvas_cull_mask | (1 << p_layer));
	} else {
		set_canvas_cull_mask(canvas_cull_mask & (~(1 << p_layer)));
	}
}
bool Viewport::get_canvas_cull_mask_bit(uint32_t p_layer) const {
	ERR_FAIL_UNSIGNED_INDEX_V(p_layer, 32, false);
	return (canvas_cull_mask & (1 << p_layer));
}
#ifndef _3D_DISABLED
AudioListener3D *Viewport::get_audio_listener_3d() const {
	return audio_listener_3d;
}
void Viewport::set_as_audio_listener_3d(bool p_enable) {