### 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
gn->set_drag(false);
						if (gn->is_comment()) {
							_set_drag_comment_enclosed_nodes(gn, comment_enclosed_nodes, false);
						}
					}
				}
			}
			if (moving_selection) {
				emit_signal(SNAME("end_node_move"));
				moving_selection = false;
			}
			dragging = false;
			top_layer->queue_redraw();
			minimap->queue_redraw();
			queue_redraw();
			connections_layer->queue_redraw();
		}
		if (b->get_button_index() == MouseButton::LEFT && b->is_pressed()) {
			GraphNode *gn = nullptr;
			
			for (int i = get_child_count() - 1; i >= 0; i--) {
				GraphNode *gn_selected = Object::cast_to<GraphNode>(get_child(i));
				if (!gn_selected) {
					continue;
				}
				if (gn_selected->is_resizing()) {
					continue;
				}
				if (gn_selected->has_point((b->get_position() - gn_selected->get_position()) / zoom)) {
					gn = gn_selected;