### 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
ERR_FAIL_COND(p_recursion_depth > COMPLETION_RECURSION_LIMIT);
	GDScriptParser::DataType base_type = p_base.type;
	if (base_type.is_meta_type && base_type.kind != GDScriptParser::DataType::BUILTIN && base_type.kind != GDScriptParser::DataType::ENUM) {
		ScriptLanguage::CodeCompletionOption option("new", ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION, ScriptLanguage::LOCATION_LOCAL);
		option.insert_text += "(";
		r_result.insert(option.display, option);
	}
	while (!base_type.has_no_type()) {
		switch (base_type.kind) {
			case GDScriptParser::DataType::CLASS: {
				_find_identifiers_in_class(base_type.class_type, p_only_functions, base_type.is_meta_type, false, r_result, p_recursion_depth);
				
				base_type = GDScriptParser::DataType();
			} break;
			case GDScriptParser::DataType::SCRIPT: {
				Ref<Script> scr = base_type.script_type;
				if (scr.is_valid()) {
					if (!p_only_functions) {
						if (!base_type.is_meta_type) {
							List<PropertyInfo> members;
							scr->get_script_property_list(&members);
							for (const PropertyInfo &E : members) {
								int location = p_recursion_depth + _get_property_location(scr->get_class_name(), E.name);
								ScriptLanguage::CodeCompletionOption option(E.name, ScriptLanguage::CODE_COMPLETION_KIND_MEMBER, location);
								r_result.insert(option.display, option);