This commit adds "download_from_url" and "unzip_file" functions to
helpers.py
These allow to downloaad files and unzip them from Python and let us
remove the bash scripts we were previously using for the same purpose.
More specifically this allows the same code to be used on Linux and
Windows IoT to download and unzip files

closes odoo/odoo#112009

Related: odoo/enterprise#36732
Signed-off-by: Quentin Lejeune (qle) <qle@odoo.com>