### 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
GraphNode *gn = Object::cast_to<GraphNode>(p_gn);
	ERR_FAIL_COND(!gn);
	top_layer->queue_redraw();
	minimap->queue_redraw();
	queue_redraw();
	connections_layer->queue_redraw();
}
void GraphEdit::add_child_notify(Node *p_child) {
	Control::add_child_notify(p_child);
	top_layer->call_deferred(SNAME("raise")); 
	GraphNode *gn = Object::cast_to<GraphNode>(p_child);
	if (gn) {
		gn->set_scale(Vector2(zoom, zoom));
		gn->connect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_node_moved).bind(gn));
		gn->connect("selected", callable_mp(this, &GraphEdit::_graph_node_selected).bind(gn));
		gn->connect("deselected", callable_mp(this, &GraphEdit::_graph_node_deselected).bind(gn));
		gn->connect("slot_updated", callable_mp(this, &GraphEdit::_graph_node_slot_updated).bind(gn));
		gn->connect("raise_request", callable_mp(this, &GraphEdit::_graph_node_raised).bind(gn));
		gn->connect("item_rect_changed", callable_mp((CanvasItem *)connections_layer, &CanvasItem::queue_redraw));
		gn->connect("item_rect_changed", callable_mp((CanvasItem *)minimap, &GraphEditMinimap::queue_redraw));
		_graph_node_moved(gn);
		gn->set_mouse_filter(MOUSE_FILTER_PASS);
	}
}
void GraphEdit::remove_child_notify(Node *p_child) {