### 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
r_result.insert(option.display, option);
					}
				}
				base_type.kind = GDScriptParser::DataType::UNRESOLVED;
			} break;
			case GDScriptParser::DataType::BUILTIN: {
				if (base.get_type() == Variant::NIL) {
					Callable::CallError err;
					Variant::construct(base_type.builtin_type, base, nullptr, 0, err);
					if (err.error != Callable::CallError::CALL_OK) {
						return;
					}
				}
				List<MethodInfo> methods;
				base.get_method_list(&methods);
				for (const MethodInfo &E : methods) {
					if (E.name == p_method) {
						r_arghint = _make_arguments_hint(E, p_argidx);
						return;
					}
				}
				base_type.kind = GDScriptParser::DataType::UNRESOLVED;
			} break;
			default: {
				base_type.kind = GDScriptParser::DataType::UNRESOLVED;
			} break;
		}
	}
}
static bool _get_subscript_type(GDScriptParser::CompletionContext &p_context, const GDScriptParser::SubscriptNode *p_subscript, GDScriptParser::DataType &r_base_type, Variant *r_base = nullptr) {