### 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)

if ((p_property.usage & PROPERTY_USAGE_CLASS_IS_ENUM) && p_property.class_name != StringName()) {
				if (CoreConstants::is_global_enum(p_property.class_name)) {
					result = make_global_enum_type(p_property.class_name, StringName(), false);
					result.is_constant = false;
				} else {
					Vector<String> names = String(p_property.class_name).split(ENUM_SEPARATOR);
					if (names.size() == 2) {
						result = make_native_enum_type(names[1], names[0], false);
						result.is_constant = false;
					}
				}
			}
			
		}
	}
	return result;
}
bool GDScriptAnalyzer::get_function_signature(GDScriptParser::Node *p_source, bool p_is_constructor, GDScriptParser::DataType p_base_type, const StringName &p_function, GDScriptParser::DataType &r_return_type, List<GDScriptParser::DataType> &r_par_types, int &r_default_arg_count, BitField<MethodFlags> &r_method_flags, StringName *r_native_class) {
	r_method_flags = METHOD_FLAGS_DEFAULT;
	r_default_arg_count = 0;
	if (r_native_class) {
		*r_native_class = StringName();
	}
	StringName function_name = p_function;
	bool was_enum = false;
	if (p_base_type.kind == GDScriptParser::DataType::ENUM) {
		was_enum = true;
		if (p_base_type.is_meta_type) {
			
			p_base_type.kind = GDScriptParser::DataType::BUILTIN;