### 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
}
				} break;
				case GDScriptParser::Node::SUBSCRIPT: {
					const GDScriptParser::SubscriptNode *sub = static_cast<const GDScriptParser::SubscriptNode *>(par->initializer);
					if (sub->is_constant) {
						if (sub->datatype.kind == GDScriptParser::DataType::ENUM) {
							def_val = sub->get_datatype().to_string();
						} else if (sub->reduced) {
							const Variant::Type vt = sub->reduced_value.get_type();
							if (vt == Variant::Type::NIL || vt == Variant::Type::FLOAT || vt == Variant::Type::INT || vt == Variant::Type::STRING || vt == Variant::Type::STRING_NAME || vt == Variant::Type::BOOL || vt == Variant::Type::NODE_PATH) {
								def_val = sub->reduced_value.operator String();
							} else {
								def_val = sub->get_datatype().to_string() + sub->reduced_value.operator String();
							}
						}
					}
				} break;
				default:
					break;
			}
			arghint += " = " + def_val;
		}
		if (i == p_arg_idx) {
			arghint += String::chr(0xFFFF);
		}
	}
	arghint += ")";
	return arghint;
}
static void _get_directory_contents(EditorFileSystemDirectory *p_dir, HashMap<String, ScriptLanguage::CodeCompletionOption> &r_list) {