### 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
connections_layer->set_disable_visibility_clip(true); 
	connections_layer->set_mouse_filter(MOUSE_FILTER_IGNORE);
	h_scroll = memnew(HScrollBar);
	h_scroll->set_name("_h_scroll");
	top_layer->add_child(h_scroll);
	v_scroll = memnew(VScrollBar);
	v_scroll->set_name("_v_scroll");
	top_layer->add_child(v_scroll);
	
	h_scroll->set_min(-10000);
	h_scroll->set_max(10000);
	v_scroll->set_min(-10000);
	v_scroll->set_max(10000);
	h_scroll->connect("value_changed", callable_mp(this, &GraphEdit::_scroll_moved));
	v_scroll->connect("value_changed", callable_mp(this, &GraphEdit::_scroll_moved));
	zoom_hb = memnew(HBoxContainer);
	top_layer->add_child(zoom_hb);
	zoom_hb->set_position(Vector2(10, 10));
	zoom_label = memnew(Label);
	zoom_hb->add_child(zoom_label);
	zoom_label->set_visible(false);
	zoom_label->set_v_size_flags(Control::SIZE_SHRINK_CENTER);
	zoom_label->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_CENTER);
	zoom_label->set_custom_minimum_size(Size2(48, 0));
	_update_zoom_label();
	zoom_minus = memnew(Button);
	zoom_minus->set_flat(true);
	zoom_hb->add_child(zoom_minus);
	zoom_minus->set_tooltip_text(RTR("Zoom Out"));
	zoom_minus->connect("pressed", callable_mp(this, &GraphEdit::_zoom_minus));