### 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)

GDScriptParser::DataType type;
	type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
	type.kind = GDScriptParser::DataType::SCRIPT;
	type.builtin_type = Variant::OBJECT;
	type.native_type = p_script->get_instance_base_type();
	type.script_type = p_script;
	type.script_path = p_script->get_path();
	type.is_constant = true;
	type.is_meta_type = true;
	return type;
}
static GDScriptParser::DataType make_enum_type(const StringName &p_enum_name, const String &p_base_name, const bool p_meta = false) {
	GDScriptParser::DataType type;
	type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
	type.kind = GDScriptParser::DataType::ENUM;
	type.builtin_type = p_meta ? Variant::DICTIONARY : Variant::INT;
	type.enum_type = p_enum_name;
	type.is_constant = true;
	type.is_meta_type = p_meta;
	
	
	if (p_base_name.is_empty()) {
		type.native_type = p_enum_name;
	} else {
		type.native_type = p_base_name + ENUM_SEPARATOR + p_enum_name;
	}
	return type;
}
static GDScriptParser::DataType make_native_enum_type(const StringName &p_enum_name, const StringName &p_native_class, bool p_meta = true) {