### 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
Size2i new_size = get_size();
	Ref<StyleBox> sb = get_theme_stylebox(SNAME("frame"));
	Ref<StyleBox> sb_slot = get_theme_stylebox(SNAME("slot"));
	int sep = get_theme_constant(SNAME("separation"));
	bool first = true;
	int children_count = 0;
	int stretch_min = 0;
	int stretch_avail = 0;
	float stretch_ratio_total = 0;
	HashMap<Control *, _MinSizeCache> min_size_cache;
	for (int i = 0; i < get_child_count(); i++) {
		Control *c = Object::cast_to<Control>(get_child(i));
		if (!c || !c->is_visible_in_tree()) {
			continue;
		}
		if (c->is_set_as_top_level()) {
			continue;
		}
		Size2i size = c->get_combined_minimum_size() + (slot_info[i].draw_stylebox ? sb_slot->get_minimum_size() : Size2());
		_MinSizeCache msc;
		stretch_min += size.height;
		msc.min_size = size.height;
		msc.will_stretch = c->get_v_size_flags().has_flag(SIZE_EXPAND);
		if (msc.will_stretch) {
			stretch_avail += msc.min_size;
			stretch_ratio_total += c->get_stretch_ratio();