### 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.class_member = p_symbol;
						return OK;
					}
				}
				if (ClassDB::has_property(class_name, p_symbol, true)) {
					r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_PROPERTY;
					r_result.class_name = base_type.native_type;
					r_result.class_member = p_symbol;
					return OK;
				}
				StringName parent = ClassDB::get_parent_class(class_name);
				if (parent != StringName()) {
					base_type.native_type = parent;
				} else {
					base_type.kind = GDScriptParser::DataType::UNRESOLVED;
				}
			} break;
			case GDScriptParser::DataType::BUILTIN: {
				base_type.kind = GDScriptParser::DataType::UNRESOLVED;
				if (Variant::has_constant(base_type.builtin_type, p_symbol)) {
					r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_CONSTANT;
					r_result.class_name = Variant::get_type_name(base_type.builtin_type);
					r_result.class_member = p_symbol;
					return OK;
				}
				Variant v;
				Ref<RefCounted> v_ref;
				if (base_type.builtin_type == Variant::OBJECT) {
					v_ref.instantiate();
					v = v_ref;