### 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
_update_scroll();
	if (connecting) {
		Node *fromn = get_node(NodePath(connecting_from));
		ERR_FAIL_COND(!fromn);
		GraphNode *from = Object::cast_to<GraphNode>(fromn);
		ERR_FAIL_COND(!from);
		Vector2 pos;
		if (connecting_out) {
			pos = from->get_connection_output_position(connecting_index);
		} else {
			pos = from->get_connection_input_position(connecting_index);
		}
		pos += from->get_position();
		Vector2 topos;
		topos = connecting_to;
		Color col = connecting_color;
		if (connecting_target) {
			col.r += 0.4;
			col.g += 0.4;
			col.b += 0.4;
		}
		if (!connecting_out) {
			SWAP(pos, topos);
		}
		_draw_connection_line(top_layer, pos, topos, col, col, lines_thickness, zoom);
	}
	if (box_selecting) {
		top_layer->draw_rect(box_selecting_rect, get_theme_color(SNAME("selection_fill")));
		top_layer->draw_rect(box_selecting_rect, get_theme_color(SNAME("selection_stroke")), false);
	}