### 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 (!is_node_hover_valid(connecting_from, connecting_index, gn->get_name(), j)) {
								continue;
							}
							connecting_target = true;
							connecting_to = pos;
							connecting_target_to = gn->get_name();
							connecting_target_index = j;
							return;
						}
					}
				}
			}
		}
	}
	if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed()) {
		if (connecting_valid) {
			if (connecting && connecting_target) {
				if (connecting_out) {
					emit_signal(SNAME("connection_request"), connecting_from, connecting_index, connecting_target_to, connecting_target_index);
				} else {
					emit_signal(SNAME("connection_request"), connecting_target_to, connecting_target_index, connecting_from, connecting_index);
				}
			} else if (!just_disconnected) {
				if (connecting_out) {
					emit_signal(SNAME("connection_to_empty"), connecting_from, connecting_index, mb->get_position());
				} else {
					emit_signal(SNAME("connection_from_empty"), connecting_from, connecting_index, mb->get_position());
				}
			}
		}