Before this commit, the recaptcha widget got the database public key
from a qweb "t-set" directive fetching directly the key from the
database when rendering the template.
Now, it is loaded beforehand and given to the session_info instead.
This has been done to improve consistency in asset bundles declarations
by reducing them to the simplest possible templates.
Part of task: 2352566
Co-authored-by: Julien Mougenot <jum@odoo.com>
Co-authored-by: Simon Genin <ges@odoo.com>