### 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
method_hint += arg;
						if (use_type_hint) {
							method_hint += ": " + _get_visual_datatype(mi.arguments[i], true, class_name);
						}
					}
				}
				method_hint += ")";
				if (use_type_hint) {
					method_hint += " -> " + _get_visual_datatype(mi.return_val, false, class_name);
				}
				method_hint += ":";
				ScriptLanguage::CodeCompletionOption option(method_hint, ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION);
				options.insert(option.display, option);
			}
		} break;
		case GDScriptParser::COMPLETION_GET_NODE: {
			
			if (p_owner) {
				List<String> opts;
				p_owner->get_argument_options("get_node", 0, &opts);
				for (const String &E : opts) {
					r_forced = true;
					String opt = E.strip_edges();
					if (opt.is_quoted()) {
						
						
						opt = opt.unquote();
					}