scripts: tool to upgrade, backup or restore Oniro

Developed a Python tool which will allow to automatically update an Oniro-based distribution or product tree to a target version, create a backup or restore a previously created backup. The tool was initially created by Davide Gardenal davide.gardenal@huawei.com.

Signed-off-by: Ghassane Ben El Aattar ghassaneb.aattar@huawei.com