### 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
for (int i = get_child_count() - 1; i >= 0; i--) {
				Ref<Texture2D> port_icon = get_theme_icon(SNAME("port"), SNAME("GraphNode"));
				GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
				if (!gn) {
					continue;
				}
				if (!connecting_out) {
					for (int j = 0; j < gn->get_connection_output_count(); j++) {
						Vector2 pos = gn->get_connection_output_position(j) + gn->get_position();
						Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
						port_size.height = MAX(port_size.height, gn->get_connection_output_height(j));
						int type = gn->get_connection_output_type(j);
						if ((type == connecting_type || valid_connection_types.has(ConnType(connecting_type, type))) && is_in_output_hotzone(gn, j, mpos, port_size)) {
							if (!is_node_hover_valid(gn->get_name(), j, connecting_from, connecting_index)) {
								continue;
							}
							connecting_target = true;
							connecting_to = pos;
							connecting_target_to = gn->get_name();
							connecting_target_index = j;
							return;
						}
					}
				} else {
					for (int j = 0; j < gn->get_connection_input_count(); j++) {
						Vector2 pos = gn->get_connection_input_position(j) + gn->get_position();
						Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
						port_size.height = MAX(port_size.height, gn->get_connection_input_height(j));
						int type = gn->get_connection_input_type(j);
						if ((type == connecting_type || valid_connection_types.has(ConnType(connecting_type, type))) && is_in_input_hotzone(gn, j, mpos, port_size)) {