### 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
minimap_button->set_toggle_mode(true);
	minimap_button->set_tooltip_text(RTR("Enable grid minimap."));
	minimap_button->connect("pressed", callable_mp(this, &GraphEdit::_minimap_toggled));
	minimap_button->set_pressed(true);
	minimap_button->set_focus_mode(FOCUS_NONE);
	zoom_hb->add_child(minimap_button);
	layout_button = memnew(Button);
	layout_button->set_flat(true);
	zoom_hb->add_child(layout_button);
	layout_button->set_tooltip_text(RTR("Arrange nodes."));
	layout_button->connect("pressed", callable_mp(this, &GraphEdit::arrange_nodes));
	layout_button->set_focus_mode(FOCUS_NONE);
	Vector2 minimap_size = Vector2(240, 160);
	float minimap_opacity = 0.65;
	minimap = memnew(GraphEditMinimap(this));
	top_layer->add_child(minimap);
	minimap->set_name("_minimap");
	minimap->set_modulate(Color(1, 1, 1, minimap_opacity));
	minimap->set_mouse_filter(MOUSE_FILTER_PASS);
	minimap->set_custom_minimum_size(Vector2(50, 50));
	minimap->set_size(minimap_size);
	minimap->set_anchors_preset(Control::PRESET_BOTTOM_RIGHT);
	minimap->set_offset(Side::SIDE_LEFT, -minimap_size.x - MINIMAP_OFFSET);
	minimap->set_offset(Side::SIDE_TOP, -minimap_size.y - MINIMAP_OFFSET);
	minimap->set_offset(Side::SIDE_RIGHT, -MINIMAP_OFFSET);
	minimap->set_offset(Side::SIDE_BOTTOM, -MINIMAP_OFFSET);
	minimap->connect("draw", callable_mp(this, &GraphEdit::_minimap_draw));
	set_clip_contents(true);
}