### 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
r_result.class_member = p_symbol;
						return OK;
					}
				}
				if (ClassDB::has_property(class_name, p_symbol, true)) {
					r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_PROPERTY;
					r_result.class_name = base_type.native_type;
					r_result.class_member = p_symbol;
					return OK;
				}
				StringName parent = ClassDB::get_parent_class(class_name);
				if (parent != StringName()) {
					base_type.native_type = parent;
				} else {
					base_type.kind = GDScriptParser::DataType::UNRESOLVED;
				}
			} break;
			case GDScriptParser::DataType::BUILTIN: {
				base_type.kind = GDScriptParser::DataType::UNRESOLVED;
				if (Variant::has_constant(base_type.builtin_type, p_symbol)) {
					r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_CONSTANT;
					r_result.class_name = Variant::get_type_name(base_type.builtin_type);
					r_result.class_member = p_symbol;
					return OK;
				}
				Variant v;
				Ref<RefCounted> v_ref;
				if (base_type.builtin_type == Variant::OBJECT) {
					v_ref.instantiate();
					v = v_ref;