### Godot version

9f12e7b52d944

### System information

arch linux

### Issue description

Attempting to edit from the editor a typed array exported from a tool script fails, any value is immediately reset, setters are never called.

### Steps to reproduce

Create a script such as follows and try to add and then change items of the array in the inspector.


```gdscript
@tool
extends Node

@export var x: Array[String]
```

### Minimal reproduction project

n/a
if (reorder_from_index < 0 || is_read_only()) {
		return;
	}
	Ref<InputEventMouseMotion> mm = p_event;
	if (mm.is_valid()) {
		Variant array = object->get_array();
		int size = array.call("size");
		
		reorder_mouse_y_delta += mm->get_relative().y;
		
		
		if ((reorder_to_index == 0 && reorder_mouse_y_delta < 0.0f) || (reorder_to_index == size - 1 && reorder_mouse_y_delta > 0.0f)) {
			reorder_mouse_y_delta = 0.0f;