### 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
option.insert_text += "(";
						} else {
							option.insert_text += "()";
						}
						break;
					case GDScriptParser::ClassNode::Member::SIGNAL:
						if (p_only_functions || outer || p_static) {
							continue;
						}
						option = ScriptLanguage::CodeCompletionOption(member.signal->identifier->name, ScriptLanguage::CODE_COMPLETION_KIND_SIGNAL, location);
						break;
					case GDScriptParser::ClassNode::Member::GROUP:
						break; 
					case GDScriptParser::ClassNode::Member::UNDEFINED:
						break;
				}
				r_result.insert(option.display, option);
			}
			outer = true;
			clss = clss->outer;
			classes_processed++;
		}
	}
	
	GDScriptCompletionIdentifier base_type;
	base_type.type = p_class->base_type;
	base_type.type.is_meta_type = p_static;
	_find_identifiers_in_base(base_type, p_only_functions, r_result, p_recursion_depth + 1);
}
static void _find_identifiers_in_base(const GDScriptCompletionIdentifier &p_base, bool p_only_functions, HashMap<String, ScriptLanguage::CodeCompletionOption> &r_result, int p_recursion_depth) {