### 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)

ERR_FAIL_COND_V(!Variant::has_utility_function(p_function), MethodInfo());
	MethodInfo info(p_function);
	if (Variant::has_utility_function_return_value(p_function)) {
		info.return_val.type = Variant::get_utility_function_return_type(p_function);
		if (info.return_val.type == Variant::NIL) {
			info.return_val.usage |= PROPERTY_USAGE_NIL_IS_VARIANT;
		}
	}
	if (Variant::is_utility_function_vararg(p_function)) {
		info.flags |= METHOD_FLAG_VARARG;
	} else {
		for (int i = 0; i < Variant::get_utility_function_argument_count(p_function); i++) {
			PropertyInfo pi;
#ifdef DEBUG_METHODS_ENABLED
			pi.name = Variant::get_utility_function_argument_name(p_function, i);
#else
			pi.name = "arg" + itos(i + 1);
#endif
			pi.type = Variant::get_utility_function_argument_type(p_function, i);
			info.arguments.push_back(pi);
		}
	}
	return info;
}
static GDScriptParser::DataType make_callable_type(const MethodInfo &p_info) {