### 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
} else {
					Callable::CallError err;
					Variant::construct(base_type.builtin_type, v, nullptr, 0, err);
					if (err.error != Callable::CallError::CALL_OK) {
						break;
					}
				}
				if (v.has_method(p_symbol)) {
					r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_METHOD;
					r_result.class_name = Variant::get_type_name(base_type.builtin_type);
					r_result.class_member = p_symbol;
					return OK;
				}
				bool valid = false;
				v.get(p_symbol, &valid);
				if (valid) {
					r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_PROPERTY;
					r_result.class_name = Variant::get_type_name(base_type.builtin_type);
					r_result.class_member = p_symbol;
					return OK;
				}
			} break;
			default: {
				base_type.kind = GDScriptParser::DataType::UNRESOLVED;
			} break;
		}
	}
	return ERR_CANT_RESOLVE;
}
::Error GDScriptLanguage::lookup_code(const String &p_code, const String &p_symbol, const String &p_path, Object *p_owner, LookupResult &r_result) {