### 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
String class_name = p_info.class_name;
	bool is_enum = p_info.type == Variant::INT && p_info.usage & PROPERTY_USAGE_CLASS_IS_ENUM;
	
	if ((p_info.type == Variant::OBJECT || is_enum) && !class_name.is_empty()) {
		if (is_enum && CoreConstants::is_global_enum(p_info.class_name)) {
			return class_name;
		}
		return _trim_parent_class(class_name, p_base_class);
	} else if (p_info.type == Variant::ARRAY && p_info.hint == PROPERTY_HINT_ARRAY_TYPE && !p_info.hint_string.is_empty()) {
		return "Array[" + _trim_parent_class(p_info.hint_string, p_base_class) + "]";
	} else if (p_info.type == Variant::NIL) {
		if (p_is_arg || (p_info.usage & PROPERTY_USAGE_NIL_IS_VARIANT)) {
			return "Variant";
		} else {
			return "void";
		}
	}
	return Variant::get_type_name(p_info.type);
}
static String _make_arguments_hint(const MethodInfo &p_info, int p_arg_idx, bool p_is_annotation = false) {