### Godot version

Godot 4.0 RC 2

### System information

Windows 11

### Issue description

As the title states you get no autocompletion when statically typing.
Of course the code still works, but it shouldn't be neccessary to cast an object to a type it already is.

### Steps to reproduce

1. Create child class with some functionality
![image](https://user-images.githubusercontent.com/100119945/220173809-0b2b2788-d986-4fa7-815c-444268d09c32.png)

2. Get node in parent class and call childs function
![image](https://user-images.githubusercontent.com/100119945/220174167-5ff3c8e9-863e-4fbd-a3cf-d88d34597b39.png)



### Minimal reproduction project

N/A
GDScriptParser::DataType base_type = p_base;
	while (base_type.is_set()) {
		switch (base_type.kind) {
			case GDScriptParser::DataType::CLASS: {
				if (base_type.class_type) {
					if (base_type.class_type->has_member(p_symbol)) {
						r_result.type = ScriptLanguage::LOOKUP_RESULT_SCRIPT_LOCATION;
						r_result.location = base_type.class_type->get_member(p_symbol).get_line();
						r_result.class_path = base_type.script_path;
						Error err = OK;
						r_result.script = GDScriptCache::get_shallow_script(r_result.class_path, err);
						return err;
					}
					base_type = base_type.class_type->base_type;
				}
			} break;
			case GDScriptParser::DataType::SCRIPT: {
				Ref<Script> scr = base_type.script_type;
				if (scr.is_valid()) {