### 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 (comment) {
		Ref<StyleBox> comment_sb = get_theme_stylebox(SNAME("comment"));
		Ref<Texture2D> resizer = get_theme_icon(SNAME("resizer"));
		if (Rect2(get_size() - resizer->get_size(), resizer->get_size()).has_point(p_point)) {
			return true;
		}
		if (Rect2(0, 0, get_size().width, comment_sb->get_margin(SIDE_TOP)).has_point(p_point)) {
			return true;
		}
		return false;
	} else {
		return Control::has_point(p_point);
	}
}
void GraphNode::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_DRAW: {
			Ref<StyleBox> sb;
			if (comment) {
				sb = get_theme_stylebox(selected ? SNAME("comment_focus") : SNAME("comment"));
			} else {
				sb = get_theme_stylebox(selected ? SNAME("selected_frame") : SNAME("frame"));
			}
			Ref<StyleBox> sb_slot = get_theme_stylebox(SNAME("slot"));
			Ref<Texture2D> port = get_theme_icon(SNAME("port"));
			Ref<Texture2D> close = get_theme_icon(SNAME("close"));