### 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)

reduce_expression(p_ternary_op->condition);
	reduce_expression(p_ternary_op->true_expr, p_is_root);
	reduce_expression(p_ternary_op->false_expr, p_is_root);
	GDScriptParser::DataType result;
	if (p_ternary_op->condition && p_ternary_op->condition->is_constant && p_ternary_op->true_expr->is_constant && p_ternary_op->false_expr && p_ternary_op->false_expr->is_constant) {
		p_ternary_op->is_constant = true;
		if (p_ternary_op->condition->reduced_value.booleanize()) {
			p_ternary_op->reduced_value = p_ternary_op->true_expr->reduced_value;
		} else {
			p_ternary_op->reduced_value = p_ternary_op->false_expr->reduced_value;
		}
	}