### 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)

p_identifier->set_datatype(type_from_metatype(base));
				p_identifier->is_constant = true;
				p_identifier->reduced_value = base.enum_values[name];
				return;
			}
			
			return;
		} else {
			push_error(R"(Cannot get property from enum value.)", p_identifier);
			return;
		}
	}
	if (base.kind == GDScriptParser::DataType::BUILTIN) {
		if (base.is_meta_type) {
			bool valid = true;
			Variant result = Variant::get_constant_value(base.builtin_type, name, &valid);
			if (valid) {
				p_identifier->is_constant = true;
				p_identifier->reduced_value = result;
				p_identifier->set_datatype(type_from_variant(result, p_identifier));
			} else if (base.is_hard_type()) {
#ifdef SUGGEST_GODOT4_RENAMES
				String rename_hint = String();
				if (GLOBAL_GET(GDScriptWarning::get_settings_path_from_code(GDScriptWarning::Code::RENAMED_IN_GODOT_4_HINT)).booleanize()) {
					const char *renamed_identifier_name = check_for_renamed_identifier(name, p_identifier->type);
					if (renamed_identifier_name) {
						rename_hint = " " + vformat(R"(Did you mean to use "%s"?)", renamed_identifier_name);
					}
				}
				push_error(vformat(R"(Cannot find constant "%s" on base "%s".%s)", name, base.to_string(), rename_hint), p_identifier);