### 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
if (E.name == call->function_name) {
						r_arghint += _make_arguments_hint(E, p_argidx);
						return;
					}
				}
			}
		}
		if (subscript->is_attribute) {
			bool found_type = _get_subscript_type(p_context, subscript, base_type, &base);
			if (!found_type) {
				GDScriptCompletionIdentifier ci;
				if (_guess_expression_type(p_context, subscript->base, ci)) {
					base_type = ci.type;
					base = ci.value;
				} else {
					return;
				}
			}
			_static = base_type.is_meta_type;
		}
	} else if (Variant::has_utility_function(call->function_name)) {
		MethodInfo info = Variant::get_utility_function_info(call->function_name);
		r_arghint = _make_arguments_hint(info, p_argidx);
		return;
	} else if (GDScriptUtilityFunctions::function_exists(call->function_name)) {
		MethodInfo info = GDScriptUtilityFunctions::get_function_info(call->function_name);
		r_arghint = _make_arguments_hint(info, p_argidx);
		return;
	} else if (GDScriptParser::get_builtin_type(call->function_name) < Variant::VARIANT_MAX) {