### 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
#ifdef TOOLS_ENABLED
	if (Engine::get_singleton()->is_editor_hint()) {
		bool use_space_indentation = EDITOR_GET("text_editor/behavior/indent/type");
		if (use_space_indentation) {
			int indent_size = EDITOR_GET("text_editor/behavior/indent/size");
			return String(" ").repeat(indent_size);
		}
	}
#endif
	return "\t";
}
void GDScriptLanguage::auto_indent_code(String &p_code, int p_from_line, int p_to_line) const {
	String indent = _get_indentation();
	Vector<String> lines = p_code.split("\n");
	List<int> indent_stack;
	for (int i = 0; i < lines.size(); i++) {
		String l = lines[i];
		int tc = 0;
		for (int j = 0; j < l.length(); j++) {
			if (l[j] == ' ' || l[j] == '\t') {
				tc++;
			} else {
				break;
			}
		}
		String st = l.substr(tc, l.length()).strip_edges();
		if (st.is_empty() || st.begins_with("#")) {
			continue; 
		}
		int ilevel = 0;