### 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
continue;
							}
							if (key.value == index.value) {
								r_type.assigned_expression = dn->elements[i].value;
								found = _guess_expression_type(p_context, dn->elements[i].value, r_type);
								break;
							}
						}
					}
					
					if (!found && index.value.is_num()) {
						int idx = index.value;
						const GDScriptParser::ArrayNode *an = nullptr;
						if (subscript->base->type == GDScriptParser::Node::ARRAY) {
							an = static_cast<const GDScriptParser::ArrayNode *>(subscript->base);
						} else if (base.assigned_expression && base.assigned_expression->type == GDScriptParser::Node::ARRAY) {
							an = static_cast<const GDScriptParser::ArrayNode *>(base.assigned_expression);
						}
						if (an && idx >= 0 && an->elements.size() > idx) {
							r_type.assigned_expression = an->elements[idx];
							found = _guess_expression_type(c, an->elements[idx], r_type);
							break;
						}
					}
					
					if (!found && (index.value.get_type() == Variant::STRING || index.value.get_type() == Variant::NODE_PATH)) {
						StringName id = index.value;
						found = _guess_identifier_type_from_base(c, base, id, r_type);
					} else if (!found && index.type.kind == GDScriptParser::DataType::BUILTIN) {
						Callable::CallError err;