During the payment pocalypse, new tests common were introduced. Those
commons were split into different classes to be as modular as possible
but we noticed during the following months (/year) that they weren't so
easy to understand and use.
Therefore, this commit aims to simplify those commons by removing the
core PaymentTestUtils common, integrating it in the base PaymentCommon,
and making the HttpCommon depend on the core PaymentCommon, instead of
using only the utils.
This doesn't require much changes in the tests since they all used
either the PaymentCommon or both PaymentCommon and PaymentHttpCommon.
Task - 2848326
Part-of: odoo/odoo#90716
Victor Feyens
26976477c4