### 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
if (!c || !c->is_visible_in_tree()) {
							continue;
						}
						if (c->is_set_as_top_level()) {
							continue;
						}
						Rect2 c_rect = c->get_rect();
						c_rect.position.x = sb->get_margin(SIDE_LEFT);
						c_rect.size.width = w;
						draw_style_box(sb_slot, c_rect);
					}
				}
			}
			if (resizable) {
				draw_texture(resizer, get_size() - resizer->get_size(), resizer_color);
			}
		} break;
		case NOTIFICATION_SORT_CHILDREN: {
			_resort();
		} break;
		case NOTIFICATION_LAYOUT_DIRECTION_CHANGED:
		case NOTIFICATION_TRANSLATION_CHANGED:
		case NOTIFICATION_THEME_CHANGED: {
			_shape();
			update_minimum_size();
			queue_redraw();
		} break;
	}
}
void GraphNode::_shape() {