Before this commit the public user did not have access to tokens or the
possibility of saving payment methods.
When receiving a link to pay the customer (even if not logged in) should
be able to use tokens saved by the parter of the document and also save
new payment methods. This is intuitively correct: as the possesor of the
link, the customer have rights to pay with tokens linked to the partner.
After this commit tokens linked to the partner of the document will be
visible to the public user and also the possibily to save payment
methods.
Task - 2799296
closesodoo/odoo#104472
Related: odoo/enterprise#34792
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>