### 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
if ("Variant" == p_symbol) {
		r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS;
		r_result.class_name = "Variant";
		return OK;
	}
	if ("PI" == p_symbol || "TAU" == p_symbol || "INF" == p_symbol || "NAN" == p_symbol) {
		r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_CONSTANT;
		r_result.class_name = "@GDScript";
		r_result.class_member = p_symbol;
		return OK;
	}
	GDScriptParser parser;
	parser.parse(p_code, p_path, true);
	GDScriptParser::CompletionContext context = parser.get_completion_context();
	context.base = p_owner;
	
	if (context.type != GDScriptParser::COMPLETION_ATTRIBUTE) {
		
		
		if (GDScriptUtilityFunctions::function_exists(p_symbol) || "assert" == p_symbol || "preload" == p_symbol) {
			r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_METHOD;
			r_result.class_name = "@GDScript";
			r_result.class_member = p_symbol;
			return OK;
		}
	}
	GDScriptAnalyzer analyzer(&parser);
	analyzer.analyze();
	if (context.current_class && context.current_class->extends.size() > 0) {
		bool success = false;