### 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 (!r_layer.size()) {
		return Vector<StringName>();
	}
	StringName p = r_layer[Math::random(0, r_layer.size() - 1)];
	Vector<StringName> left;
	Vector<StringName> right;
	for (int i = 0; i < r_layer.size(); i++) {
		if (p != r_layer[i]) {
			StringName q = r_layer[i];
			int cross_pq = r_crossings[p][q];
			int cross_qp = r_crossings[q][p];
			if (cross_pq > cross_qp) {
				left.push_back(q);
			} else {
				right.push_back(q);
			}
		}
	}
	left.push_back(p);
	left.append_array(right);
	return left;
}
void GraphEdit::_horizontal_alignment(Dictionary &r_root, Dictionary &r_align, const HashMap<int, Vector<StringName>> &r_layers, const HashMap<StringName, HashSet<StringName>> &r_upper_neighbours, const HashSet<StringName> &r_selected_nodes) {
	for (const StringName &E : r_selected_nodes) {
		r_root[E] = E;
		r_align[E] = E;
	}
	if (r_layers.size() == 1) {