- The method `_get_available_payment_input` that returns the available
payments acquirers and the payments tokens for a specific user never
returns the payments tokens linked to a non s2s payment acquirers.
This is wrong, the payments tokens should always appears no matter
what are the acquirers' payment flow.
The payment flow is used only to specify where the customer should
input his credit cards details, either on Odoo or on the payment
acquirer's website (or popup).
Once a token is created, it is safe to process it since no credits cards
details are stored on the Odoo database.
closesodoo/odoo#30258