### 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 (base_type.kind != GDScriptParser::DataType::SCRIPT && base_type.kind != GDScriptParser::DataType::CLASS) { 
			push_error("Cannot assign a new value to a constant.", p_assignment->assignee);
			return;
		}
	} else if (assignee_type.is_read_only) {
		push_error("Cannot assign a new value to a read-only property.", p_assignment->assignee);
		return;
	} else if (p_assignment->assignee->type == GDScriptParser::Node::SUBSCRIPT) {
		GDScriptParser::SubscriptNode *sub = static_cast<GDScriptParser::SubscriptNode *>(p_assignment->assignee);
		while (sub) {
			const GDScriptParser::DataType &base_type = sub->base->datatype;
			if (base_type.is_hard_type() && base_type.is_read_only) {
				if (base_type.kind == GDScriptParser::DataType::BUILTIN && !Variant::is_type_shared(base_type.builtin_type)) {
					push_error("Cannot assign a new value to a read-only property.", p_assignment->assignee);
					return;
				}
			} else {
				break;
			}
			if (sub->base->type == GDScriptParser::Node::SUBSCRIPT) {
				sub = static_cast<GDScriptParser::SubscriptNode *>(sub->base);
			} else {
				sub = nullptr;
			}
		}
	}
	
	if (p_assignment->assigned_value->type == GDScriptParser::Node::ARRAY && assignee_type.has_container_element_type()) {
		update_array_literal_element_type(static_cast<GDScriptParser::ArrayNode *>(p_assignment->assigned_value), assignee_type.get_container_element_type());
	}