[FIX] payment: fix multicompany payment confirmation onboarding step

User was not able to go through onboarding if they switched company.
By default it tried to edit default payment provider that was conected
to the main company so other companies were recieving Access Error.

opw-3281770

closes odoo/odoo#121621

Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>