### 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
GDScriptCompletionIdentifier ci;
	ci.value = p_value;
	ci.type.is_constant = true;
	ci.type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
	ci.type.kind = GDScriptParser::DataType::BUILTIN;
	ci.type.builtin_type = p_value.get_type();
	if (ci.type.builtin_type == Variant::OBJECT) {
		Object *obj = p_value.operator Object *();
		if (!obj) {
			return ci;
		}
		ci.type.native_type = obj->get_class_name();
		Ref<Script> scr = p_value;
		if (scr.is_valid()) {
			ci.type.is_meta_type = true;
		} else {
			ci.type.is_meta_type = false;
			scr = obj->get_script();
		}
		if (scr.is_valid()) {
			ci.type.script_type = scr;
			ci.type.kind = GDScriptParser::DataType::SCRIPT;
			ci.type.native_type = scr->get_instance_base_type();
		} else {
			ci.type.kind = GDScriptParser::DataType::NATIVE;
		}
	}
	return ci;
}
static GDScriptCompletionIdentifier _type_from_property(const PropertyInfo &p_property) {