### 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 (!p_property.begins_with("indices") && !p_property.begins_with(PackedScene::META_POINTER_PROPERTY_BASE + "indices")) {
		return;
	}
	int index;
	if (p_property.begins_with("metadata/")) {
		index = p_property.get_slice("/", 2).to_int();
	} else {
		index = p_property.get_slice("/", 1).to_int();
	}
	Variant array;
	const Variant &original_array = object->get_array();
	if (original_array.get_type() == Variant::ARRAY) {
		
		Array temp;
		temp.assign(original_array.duplicate());
		array = temp;
	} else {
		array = original_array.duplicate();
	}
	array.set(index, p_value);
	object->set_array(array);
	emit_changed(get_edited_property(), array, "", true);
}
void EditorPropertyArray::_change_type(Object *p_button, int p_index) {