### Godot version

v4.0.beta17.official [c40020513]

### System information

Apple M1 Max - macOS Ventura 13.1 (22C65)

### Issue description

I am getting an error due to functions no longer returning the correct typed array, when the function concatenates arrays and returns it.

In other words, the following fails:

```
func add_arrays() -> Array[ClassA]:
	var array_1: Array[ClassA] = []
	var array_2: Array[ClassA] = []
	return array_1 + array_2
```

<img width="864" alt="Screenshot 2023-02-02 at 1 02 53 PM" src="https://user-images.githubusercontent.com/905216/216320503-475bf4a1-353e-455c-87d5-69d036db706c.png">

I'm assuming when concatenating, the typing changes to a generic `Array` now? Just a guess. 

### Steps to reproduce

N/A

### Minimal reproduction project

[Godot Crash Project.zip](https://github.com/godotengine/godot/files/10568780/Godot.Crash.Project.zip)

MethodInfo info;
		StringName script_class = p_base_type.kind == GDScriptParser::DataType::SCRIPT ? p_base_type.script_type->get_class_name() : StringName(GDScript::get_class_static());
		if (ClassDB::get_method_info(script_class, function_name, &info)) {
			return function_signature_from_info(info, r_return_type, r_par_types, r_default_arg_count, r_method_flags);
		}
	}
	if (p_is_constructor) {
		
		r_return_type = p_base_type;
		r_return_type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
		r_return_type.is_meta_type = false;
		return true;
	}
	MethodInfo info;
	if (ClassDB::get_method_info(base_native, function_name, &info)) {
		bool valid = function_signature_from_info(info, r_return_type, r_par_types, r_default_arg_count, r_method_flags);
		if (valid && Engine::get_singleton()->has_singleton(base_native)) {
			r_method_flags.set_flag(METHOD_FLAG_STATIC);
		}
#ifdef DEBUG_ENABLED
		MethodBind *native_method = ClassDB::get_method(base_native, function_name);
		if (native_method && r_native_class) {
			*r_native_class = native_method->get_instance_class();
		}
#endif
		return valid;
	}
	return false;
}
bool GDScriptAnalyzer::function_signature_from_info(const MethodInfo &p_info, GDScriptParser::DataType &r_return_type, List<GDScriptParser::DataType> &r_par_types, int &r_default_arg_count, BitField<MethodFlags> &r_method_flags) {