### 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
const String quote_style = EDITOR_GET("text_editor/completion/use_single_quotes") ? "'" : "\"";
	for (int i = 0; i < p_dir->get_file_count(); i++) {
		ScriptLanguage::CodeCompletionOption option(p_dir->get_file_path(i), ScriptLanguage::CODE_COMPLETION_KIND_FILE_PATH);
		option.insert_text = option.display.quote(quote_style);
		r_list.insert(option.display, option);
	}
	for (int i = 0; i < p_dir->get_subdir_count(); i++) {
		_get_directory_contents(p_dir->get_subdir(i), r_list);
	}
}
static void _find_annotation_arguments(const GDScriptParser::AnnotationNode *p_annotation, int p_argument, const String p_quote_style, HashMap<String, ScriptLanguage::CodeCompletionOption> &r_result) {
	if (p_annotation->name == SNAME("@export_range")) {
		if (p_argument == 3 || p_argument == 4 || p_argument == 5) {
			
			ScriptLanguage::CodeCompletionOption slider1("or_greater", ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
			slider1.insert_text = slider1.display.quote(p_quote_style);
			r_result.insert(slider1.display, slider1);
			ScriptLanguage::CodeCompletionOption slider2("or_less", ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
			slider2.insert_text = slider2.display.quote(p_quote_style);
			r_result.insert(slider2.display, slider2);
			ScriptLanguage::CodeCompletionOption slider3("hide_slider", ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
			slider3.insert_text = slider3.display.quote(p_quote_style);
			r_result.insert(slider3.display, slider3);
		}
	} else if (p_annotation->name == SNAME("@export_exp_easing")) {
		if (p_argument == 0 || p_argument == 1) {