As some payment acquirers require the email to be set, a warning is shown when generating a payment link if the partner does not have an email. OPW-2254011 closes odoo/odoo#51857 X-original-commit: 6f61e89ab9b947ca54cfd8dbd5470083a625d24e Signed-off-by: Damien Bouvy (dbo) <dbo@odoo.com>