### 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
Ref<Texture2D> port_icon = get_theme_icon(SNAME("port"), SNAME("GraphNode"));
	for (int i = get_child_count() - 1; i >= 0; i--) {
		GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
		if (!gn) {
			continue;
		}
		for (int j = 0; j < gn->get_connection_input_count(); j++) {
			Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
			port_size.height = MAX(port_size.height, gn->get_connection_input_height(j));
			if (is_in_input_hotzone(gn, j, p_point / zoom, port_size)) {
				return true;
			}
		}
		for (int j = 0; j < gn->get_connection_output_count(); j++) {
			Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
			port_size.height = MAX(port_size.height, gn->get_connection_output_height(j));
			if (is_in_output_hotzone(gn, j, p_point / zoom, port_size)) {
				return true;
			}
		}
	}
	return false;
}
void GraphEdit::_top_layer_input(const Ref<InputEvent> &p_ev) {