### 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
ScriptLanguage::CodeCompletionOption hint1("attenuation", ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
			hint1.insert_text = hint1.display.quote(p_quote_style);
			r_result.insert(hint1.display, hint1);
			ScriptLanguage::CodeCompletionOption hint2("inout", ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
			hint2.insert_text = hint2.display.quote(p_quote_style);
			r_result.insert(hint2.display, hint2);
		}
	} else if (p_annotation->name == SNAME("@export_node_path")) {
		ScriptLanguage::CodeCompletionOption node("Node", ScriptLanguage::CODE_COMPLETION_KIND_CLASS);
		node.insert_text = node.display.quote(p_quote_style);
		r_result.insert(node.display, node);
		List<StringName> native_classes;
		ClassDB::get_inheriters_from_class("Node", &native_classes);
		for (const StringName &E : native_classes) {
			if (!ClassDB::is_class_exposed(E)) {
				continue;
			}
			ScriptLanguage::CodeCompletionOption option(E, ScriptLanguage::CODE_COMPLETION_KIND_CLASS);
			option.insert_text = option.display.quote(p_quote_style);
			r_result.insert(option.display, option);
		}
		List<StringName> global_script_classes;
		ScriptServer::get_global_class_list(&global_script_classes);
		for (const StringName &E : global_script_classes) {
			if (!ClassDB::is_parent_class(ScriptServer::get_global_class_native_base(E), "Node")) {
				continue;
			}
			ScriptLanguage::CodeCompletionOption option(E, ScriptLanguage::CODE_COMPLETION_KIND_CLASS);
			option.insert_text = option.display.quote(p_quote_style);
			r_result.insert(option.display, option);