### Godot version

4.0.dev (d0398f62f0)

### System information

Windows 10

### Issue description

`GraphNode` class declares members with conflicting names.  
- `selected` property: https://github.com/godotengine/godot/blob/0daa86d70e7338506c37bee6b6e0c4aba7255d68/scene/gui/graph_node.cpp#L1154
- `selected` signal: https://github.com/godotengine/godot/blob/0daa86d70e7338506c37bee6b6e0c4aba7255d68/scene/gui/graph_node.cpp#L1164

As now signals are truely members of the class, this leads to name colliding in several languages.  
- In GDScript, the signal can't be used as it is treated as a property:
![image](https://user-images.githubusercontent.com/48322356/210059248-edbbd142-5d34-41f0-a3f5-08d4f2e02fc3.png)
- In Kotlin, the generated API code cannot compile as signal and property declarations are conflicting:
```
e: ~\git\godot\modules\kotlin_jvm\kt\godot-library\src\main\kotlin\godot\gen\godot\GraphNode.kt: (53, 14): Conflicting declarations: public final val selected: Signal0, public final var selected: Boolean
e: ~\git\godot\modules\kotlin_jvm\kt\godot-library\src\main\kotlin\godot\gen\godot\GraphNode.kt: (182, 14): Conflicting declarations: public final val selected: Signal0, public final var selected: Boolean
```

### Steps to reproduce

Try to use `selected` signal from GDScript.

### Minimal reproduction project

N/A
Rect2 hotzone = Rect2(
			pos.x - (p_left ? port_hotzone_outer_extent : port_hotzone_inner_extent),
			pos.y - p_port_size.height / 2.0,
			port_hotzone_inner_extent + port_hotzone_outer_extent,
			p_port_size.height);
	if (!hotzone.has_point(p_mouse_pos)) {
		return false;
	}
	for (int i = 0; i < get_child_count(); i++) {
		Control *child = Object::cast_to<Control>(get_child(i));
		if (!child) {
			continue;
		}
		Rect2 child_rect = child->get_rect();
		child_rect.size *= zoom;
		if (child_rect.has_point(p_mouse_pos * zoom)) {
			for (int j = 0; j < child->get_child_count(); j++) {
				Control *subchild = Object::cast_to<Control>(child->get_child(j));
				if (!subchild) {
					continue;
				}
				if (_check_clickable_control(subchild, p_mouse_pos * zoom, child_rect.position)) {
					return false;
				}
			}
		}
	}
	return true;
}
PackedVector2Array GraphEdit::get_connection_line(const Vector2 &p_from, const Vector2 &p_to) {