### 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
Ref<StyleBox> sb = get_theme_stylebox(SNAME("frame"));
	Ref<StyleBox> sb_slot = get_theme_stylebox(SNAME("slot"));
	int sep = get_theme_constant(SNAME("separation"));
	int title_h_offset = get_theme_constant(SNAME("title_h_offset"));
	bool first = true;
	Size2 minsize;
	minsize.x = title_buf->get_size().x + title_h_offset;
	if (show_close) {
		int close_h_offset = get_theme_constant(SNAME("close_h_offset"));
		Ref<Texture2D> close = get_theme_icon(SNAME("close"));
		
		minsize.x += 12 + close->get_width() + close_h_offset;
	}
	for (int i = 0; i < get_child_count(); i++) {
		Control *c = Object::cast_to<Control>(get_child(i));
		if (!c) {
			continue;
		}
		if (c->is_set_as_top_level()) {
			continue;
		}
		Size2i size = c->get_combined_minimum_size();
		if (slot_info.has(i)) {
			size += slot_info[i].draw_stylebox ? sb_slot->get_minimum_size() : Size2();
		}
		minsize.y += size.y;
		minsize.x = MAX(minsize.x, size.x);
		if (first) {
			first = false;