### 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
r_type.type.kind = GDScriptParser::DataType::BUILTIN;
					r_type.type.builtin_type = GDScriptParser::get_builtin_type(call->function_name);
					found = true;
					break;
				} else if (GDScriptUtilityFunctions::function_exists(call->function_name)) {
					MethodInfo mi = GDScriptUtilityFunctions::get_function_info(call->function_name);
					r_type = _type_from_property(mi.return_val);
					found = true;
					break;
				} else {
					GDScriptParser::CompletionContext c = p_context;
					c.current_line = call->start_line;
					GDScriptParser::Node::Type callee_type = call->get_callee_type();
					GDScriptCompletionIdentifier base;
					if (callee_type == GDScriptParser::Node::IDENTIFIER || call->is_super) {
						
						if (p_context.current_class) {
							if (call->is_super) {
								base.type = p_context.current_class->base_type;
								base.value = p_context.base;
							} else {
								base.type.kind = GDScriptParser::DataType::CLASS;
								base.type.type_source = GDScriptParser::DataType::INFERRED;
								base.type.is_constant = true;
								base.type.class_type = p_context.current_class;
								base.value = p_context.base;
							}
						} else {
							break;
						}