### 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)

case Variant::TRANSFORM3D:
					case Variant::PROJECTION:
					case Variant::PLANE:
					case Variant::COLOR:
					case Variant::DICTIONARY:
					case Variant::OBJECT:
						result_type.kind = GDScriptParser::DataType::VARIANT;
						result_type.type_source = GDScriptParser::DataType::UNDETECTED;
						break;
					
					case Variant::ARRAY:
						if (base_type.has_container_element_type()) {
							result_type = base_type.get_container_element_type();
							result_type.type_source = base_type.type_source;
						} else {
							result_type.kind = GDScriptParser::DataType::VARIANT;
							result_type.type_source = GDScriptParser::DataType::UNDETECTED;
						}
						break;
					
					case Variant::VARIANT_MAX:
						break;
				}
			}
		}
	}
	p_subscript->set_datatype(result_type);
}
void GDScriptAnalyzer::reduce_ternary_op(GDScriptParser::TernaryOpNode *p_ternary_op, bool p_is_root) {