### 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
bool success;
	if (GDVIRTUAL_CALL(_is_in_input_hotzone, p_node, p_port, p_mouse_pos, success)) {
		return success;
	} else {
		Vector2 pos = p_node->get_connection_input_position(p_port) + p_node->get_position();
		return is_in_port_hotzone(pos / zoom, p_mouse_pos, p_port_size, true);
	}
}
bool GraphEdit::is_in_output_hotzone(GraphNode *p_node, int p_port, const Vector2 &p_mouse_pos, const Vector2i &p_port_size) {
	bool success;
	if (GDVIRTUAL_CALL(_is_in_output_hotzone, p_node, p_port, p_mouse_pos, success)) {
		return success;
	} else {
		Vector2 pos = p_node->get_connection_output_position(p_port) + p_node->get_position();
		return is_in_port_hotzone(pos / zoom, p_mouse_pos, p_port_size, false);
	}
}
bool GraphEdit::is_in_port_hotzone(const Vector2 &pos, const Vector2 &p_mouse_pos, const Vector2i &p_port_size, bool p_left) {