### 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
float current_node_start_pos = start_from;
				if (current_node_size < largest_node_size / 2) {
					if (!(i || j)) {
						start_from -= (largest_node_size - current_node_size);
					}
					current_node_start_pos = start_from + largest_node_size - current_node_size;
				}
				cal_pos.x = current_node_start_pos;
			}
			new_positions.insert(layer[j], cal_pos);
		}
		start_from += largest_node_size + gap_h;
		largest_node_size = 0.0f;
	}
	emit_signal(SNAME("begin_node_move"));
	for (const StringName &E : selected_nodes) {
		GraphNode *gn = Object::cast_to<GraphNode>(node_names[E]);
		gn->set_drag(true);
		Vector2 pos = (new_positions[E]);
		if (is_using_snap()) {
			const int snap = get_snap();
			pos = pos.snapped(Vector2(snap, snap));
		}
		gn->set_position_offset(pos);
		gn->set_drag(false);
	}
	emit_signal(SNAME("end_node_move"));
	arranging_graph = false;
}
void GraphEdit::_bind_methods() {