### 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
} else if (p_ev->is_action("ui_copy", true)) {
			emit_signal(SNAME("copy_nodes_request"));
			accept_event();
		} else if (p_ev->is_action("ui_paste", true)) {
			emit_signal(SNAME("paste_nodes_request"));
			accept_event();
		} else if (p_ev->is_action("ui_graph_delete", true)) {
			TypedArray<StringName> nodes;
			for (int i = 0; i < get_child_count(); i++) {
				GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
				if (!gn) {
					continue;
				}
				if (gn->is_selected() && gn->is_close_button_visible()) {
					nodes.push_back(gn->get_name());
				}
			}
			emit_signal(SNAME("delete_nodes_request"), nodes);
			accept_event();
		}
	}
	Ref<InputEventMagnifyGesture> magnify_gesture = p_ev;
	if (magnify_gesture.is_valid()) {
		set_zoom_custom(zoom * magnify_gesture->get_factor(), magnify_gesture->get_position());
	}
	Ref<InputEventPanGesture> pan_gesture = p_ev;
	if (pan_gesture.is_valid()) {
		h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() * pan_gesture->get_delta().x / 8);
		v_scroll->set_value(v_scroll->get_value() + v_scroll->get_page() * pan_gesture->get_delta().y / 8);
	}