### 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)
ClassDB::bind_method(D_METHOD("gui_is_dragging"), &Viewport::gui_is_dragging);
	ClassDB::bind_method(D_METHOD("gui_is_drag_successful"), &Viewport::gui_is_drag_successful);
	ClassDB::bind_method(D_METHOD("gui_release_focus"), &Viewport::gui_release_focus);
	ClassDB::bind_method(D_METHOD("gui_get_focus_owner"), &Viewport::gui_get_focus_owner);
	ClassDB::bind_method(D_METHOD("set_disable_input", "disable"), &Viewport::set_disable_input);
	ClassDB::bind_method(D_METHOD("is_input_disabled"), &Viewport::is_input_disabled);
	ClassDB::bind_method(D_METHOD("_gui_remove_focus_for_window"), &Viewport::_gui_remove_focus_for_window);
	ClassDB::bind_method(D_METHOD("_post_gui_grab_click_focus"), &Viewport::_post_gui_grab_click_focus);
	ClassDB::bind_method(D_METHOD("set_positional_shadow_atlas_size", "size"), &Viewport::set_positional_shadow_atlas_size);
	ClassDB::bind_method(D_METHOD("get_positional_shadow_atlas_size"), &Viewport::get_positional_shadow_atlas_size);
	ClassDB::bind_method(D_METHOD("set_positional_shadow_atlas_16_bits", "enable"), &Viewport::set_positional_shadow_atlas_16_bits);
	ClassDB::bind_method(D_METHOD("get_positional_shadow_atlas_16_bits"), &Viewport::get_positional_shadow_atlas_16_bits);
	ClassDB::bind_method(D_METHOD("set_snap_controls_to_pixels", "enabled"), &Viewport::set_snap_controls_to_pixels);
	ClassDB::bind_method(D_METHOD("is_snap_controls_to_pixels_enabled"), &Viewport::is_snap_controls_to_pixels_enabled);
	ClassDB::bind_method(D_METHOD("set_snap_2d_transforms_to_pixel", "enabled"), &Viewport::set_snap_2d_transforms_to_pixel);
	ClassDB::bind_method(D_METHOD("is_snap_2d_transforms_to_pixel_enabled"), &Viewport::is_snap_2d_transforms_to_pixel_enabled);
	ClassDB::bind_method(D_METHOD("set_snap_2d_vertices_to_pixel", "enabled"), &Viewport::set_snap_2d_vertices_to_pixel);
	ClassDB::bind_method(D_METHOD("is_snap_2d_vertices_to_pixel_enabled"), &Viewport::is_snap_2d_vertices_to_pixel_enabled);
	ClassDB::bind_method(D_METHOD("set_positional_shadow_atlas_quadrant_subdiv", "quadrant", "subdiv"), &Viewport::set_positional_shadow_atlas_quadrant_subdiv);
	ClassDB::bind_method(D_METHOD("get_positional_shadow_atlas_quadrant_subdiv", "quadrant"), &Viewport::get_positional_shadow_atlas_quadrant_subdiv);
	ClassDB::bind_method(D_METHOD("set_input_as_handled"), &Viewport::set_input_as_handled);
	ClassDB::bind_method(D_METHOD("is_input_handled"), &Viewport::is_input_handled);
	ClassDB::bind_method(D_METHOD("set_handle_input_locally", "enable"), &Viewport::set_handle_input_locally);
	ClassDB::bind_method(D_METHOD("is_handling_input_locally"), &Viewport::is_handling_input_locally);
	ClassDB::bind_method(D_METHOD("set_default_canvas_item_texture_filter", "mode"), &Viewport::set_default_canvas_item_texture_filter);
	ClassDB::bind_method(D_METHOD("get_default_canvas_item_texture_filter"), &Viewport::get_default_canvas_item_texture_filter);
	ClassDB::bind_method(D_METHOD("set_embedding_subwindows", "enable"), &Viewport::set_embedding_subwindows);
	ClassDB::bind_method(D_METHOD("is_embedding_subwindows"), &Viewport::is_embedding_subwindows);
	ClassDB::bind_method(D_METHOD("set_canvas_cull_mask", "mask"), &Viewport::set_canvas_cull_mask);
	ClassDB::bind_method(D_METHOD("get_canvas_cull_mask"), &Viewport::get_canvas_cull_mask);