### 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
save_mode = true;
}
void EditorPropertyPath::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_ENTER_TREE:
		case NOTIFICATION_THEME_CHANGED: {
			path_edit->set_icon(get_theme_icon(SNAME("Folder"), SNAME("EditorIcons")));
		} break;
	}
}
void EditorPropertyPath::_path_focus_exited() {
	_path_selected(path->get_text());
}
void EditorPropertyPath::_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) {
	const Dictionary drag_data = p_data;
	if (!drag_data.has("type")) {
		return;
	}
	if (String(drag_data["type"]) != "files") {
		return;
	}
	const Vector<String> filesPaths = drag_data["files"];
	if (filesPaths.size() == 0) {
		return;
	}
	emit_changed(get_edited_property(), filesPaths[0]);
	update_property();
}
bool EditorPropertyPath::_can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const {