### 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
break;
				}
			}
			if (gn) {
				if (_filter_input(b->get_position())) {
					return;
				}
				
				dragging = true;
				drag_accum = Vector2();
				just_selected = !gn->is_selected();
				if (!gn->is_selected() && !Input::get_singleton()->is_key_pressed(Key::CTRL)) {
					for (int i = 0; i < get_child_count(); i++) {
						GraphNode *o_gn = Object::cast_to<GraphNode>(get_child(i));
						if (!o_gn) {
							continue;
						}
						o_gn->set_selected(o_gn == gn);
					}
				}
				gn->set_selected(true);
				for (int i = 0; i < get_child_count(); i++) {
					GraphNode *o_gn = Object::cast_to<GraphNode>(get_child(i));
					if (!o_gn) {
						continue;
					}
					if (o_gn->is_selected()) {
						o_gn->set_drag(true);
						if (o_gn->is_comment()) {
							_update_comment_enclosed_nodes_list(o_gn, comment_enclosed_nodes);