[FIX] payment_paypal: fix paypal onboarding
[FIX] payment_paypal: fix paypal onboarding

after paypal onboarding, merchant email and pdt token
is not required at all, for the new users.
They can accept payment with just email address.

closes odoo/odoo#39127

X-original-commit: 05533cd59fbfdafa79f57987f17a6761f8237a3b
Signed-off-by: Damien Bouvy (dbo) <26cc0816b78fc1f1d6597524ae2f7230dc232c77@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo