### Godot version

4.0 rc1

### System information

Windows 11, GTX 1080Ti, Vulkan

### Issue description

Automplete can't find any variables and methods on custom classes when the nodes are loaded with `@onready`:

simple_rotate.gd:
```gdscript
extends Node2D
class_name SimpleRotate

@export var shouldRotate : bool = true
```

machine.gd:
```gdscript
@onready var wheel1 : SimpleRotate = $Wheel

func start_motor():
	wheel1.sho... # Doesn't autocomplete, it can't find shouldRotate 
```

If I add another cast like below, autocomplete does work:
machine.gd:
```gdscript
@onready var wheel1 : SimpleRotate = $Wheel as SimpleRotate

func start_motor():
	wheel1.shouldRotate = true # Autocomplete works
```

To make things even weirder, it does work if I make Wheel into a unique name and access it using %:
machine.gd:
```gdscript
@onready var wheel1 : SimpleRotate = $"%Wheel"

func start_motor():
	wheel1.shouldRotate = true # Autocomplete works
```


### Steps to reproduce

- Create a script with a class_name
- Add that script to a node
- Create another script referencing the node with the type of the script
- Try to let automcomplete find any methods or variables on the script with the class_name
- Notice that it fails

### Minimal reproduction project

N/A
for (List<Pair<String, Variant>>::Element *CE = cinfo.front(); CE; CE = CE->next()) {
			if (CE->get().first == E.key) {
				is_script_constant = true;
				break;
			}
		}
		if (is_script_constant) {
			continue;
		}
		const Variant &var = gl_array[E.value];
		if (Object *obj = var) {
			if (Object::cast_to<GDScriptNativeClass>(obj)) {
				continue;
			}
		}
		bool skip = false;
		for (int i = 0; i < CoreConstants::get_global_constant_count(); i++) {
			if (E.key == CoreConstants::get_global_constant_name(i)) {
				skip = true;
				break;
			}
		}
		if (skip) {
			continue;
		}
		p_globals->push_back(E.key);
		p_values->push_back(var);
	}
}
String GDScriptLanguage::debug_parse_stack_level_expression(int p_level, const String &p_expression, int p_max_subitems, int p_max_depth) {