### Godot version

v4.1.1.stable.official [bd6af8e0e]

### System information

Godot v4.1.1.stable - Debian GNU/Linux trixie/sid trixie - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (nvidia) - Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz (6 Threads)

### Issue description

`Area2D`s which extend beyond the bounds of the root viewport, eg. when using a `canvas_items` stretch mode, receive mouse input events even in the black bands letterboxing the game:

https://github.com/godotengine/godot/assets/441188/3beb962f-c1fa-4098-a375-f3d862013577


### Steps to reproduce

1. Set project stretch mode to either `canvas_items` or `viewport`
2. Have an `Area2D` whose `CollisionShape` extends beyond the bounds of the rendered region
3. Connect the `Area2D`'s `mouse_[entered|exited]` signal to something
4. Wave the mouse around in the black areas outside the rendered game

### Minimal reproduction project

Project used for video demo above:

[area2d-oob.zip](https://github.com/godotengine/godot/files/12207031/area2d-oob.zip)

This only demos `mouse_[entered|exited]`, but I first encountered this with the `Area2D.input_event` signal, where it received mouse clicks as well.
if (p_property.name == "position" && initial_position != WINDOW_INITIAL_POSITION_ABSOLUTE) {
		p_property.usage = PROPERTY_USAGE_NONE;
	}
	if (p_property.name == "current_screen" && initial_position != WINDOW_INITIAL_POSITION_CENTER_OTHER_SCREEN) {
		p_property.usage = PROPERTY_USAGE_NONE;
	}
	if (p_property.name == "theme_type_variation") {
		List<StringName> names;
		
		
		ThemeDB::get_singleton()->get_default_theme()->get_type_variation_list(get_class_name(), &names);
		if (ThemeDB::get_singleton()->get_project_theme().is_valid()) {
			ThemeDB::get_singleton()->get_project_theme()->get_type_variation_list(get_class_name(), &names);
		}
		names.sort_custom<StringName::AlphCompare>();
		Vector<StringName> unique_names;
		String hint_string;
		for (const StringName &E : names) {
			
			if (unique_names.has(E)) {
				continue;
			}
			hint_string += String(E) + ",";
			unique_names.append(E);
		}
		p_property.hint_string = hint_string;
	}
}
void Window::set_title(const String &p_title) {