Before 660dc0ebaf it was possible to use Authorize to pay via your bank
account using the "Redirection to payment acquirer" option. Since the
refactor removed the redirect it was no longer possible. This commit
reintroduces that feature.
It does so by adding new form elements that accept bank account
information. Additionally it reintroduces the `billTo` and `customer`
parameters that Authorize requires when processing ACH payments.
task-2628318
closes odoo/odoo#75289
Signed-off-by: Antoine Vandevenne (anv) <AntoineVDV@users.noreply.github.com>