### 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
Vector2 camera_center = _convert_from_graph_position(camera_position + camera_size / 2) + minimap_offset;
	Vector2 camera_viewport = _convert_from_graph_position(camera_size);
	Vector2 camera_pos = (camera_center - camera_viewport / 2);
	return Rect2(camera_pos, camera_viewport);
}
Vector2 GraphEditMinimap::_get_render_size() {
	if (!is_inside_tree()) {
		return Vector2(0, 0);
	}
	return get_size() - 2 * minimap_padding;
}
Vector2 GraphEditMinimap::_get_graph_offset() {
	return Vector2(ge->h_scroll->get_min(), ge->v_scroll->get_min());
}
Vector2 GraphEditMinimap::_get_graph_size() {
	Vector2 graph_size = Vector2(ge->h_scroll->get_max(), ge->v_scroll->get_max()) - Vector2(ge->h_scroll->get_min(), ge->v_scroll->get_min());
	if (graph_size.x == 0) {
		graph_size.x = 1;
	}
	if (graph_size.y == 0) {
		graph_size.y = 1;
	}
	return graph_size;
}
Vector2 GraphEditMinimap::_convert_from_graph_position(const Vector2 &p_position) {