### 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
for (int i = 0; i < p_comment_enclosed_nodes[p_node->get_name()].size(); i++) {
		p_comment_enclosed_nodes[p_node->get_name()][i]->set_drag(p_drag);
	}
}
void GraphEdit::_set_position_of_comment_enclosed_nodes(GraphNode *p_node, HashMap<StringName, Vector<GraphNode *>> &p_comment_enclosed_nodes, Vector2 p_drag_accum) {
	for (int i = 0; i < p_comment_enclosed_nodes[p_node->get_name()].size(); i++) {
		Vector2 pos = (p_comment_enclosed_nodes[p_node->get_name()][i]->get_drag_from() * zoom + drag_accum) / zoom;
		if (is_using_snap() ^ Input::get_singleton()->is_key_pressed(Key::CTRL)) {
			const int snap = get_snap();
			pos = pos.snapped(Vector2(snap, snap));
		}
		p_comment_enclosed_nodes[p_node->get_name()][i]->set_position_offset(pos);
	}
}
bool GraphEdit::_filter_input(const Point2 &p_point) {