### 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
for (int i = 0; i < 4; i++) {
		spin[i]->set_read_only(p_read_only);
	}
}
void EditorPropertyRect2::_value_changed(double val, const String &p_name) {
	if (setting) {
		return;
	}
	Rect2 r2;
	r2.position.x = spin[0]->get_value();
	r2.position.y = spin[1]->get_value();
	r2.size.x = spin[2]->get_value();
	r2.size.y = spin[3]->get_value();
	emit_changed(get_edited_property(), r2, p_name);
}
void EditorPropertyRect2::update_property() {
	Rect2 val = get_edited_property_value();
	setting = true;
	spin[0]->set_value(val.position.x);
	spin[1]->set_value(val.position.y);
	spin[2]->set_value(val.size.x);
	spin[3]->set_value(val.size.y);
	setting = false;
}
void EditorPropertyRect2::_notification(int p_what) {