[FIX] website_sale: add tests
[FIX] website_sale: add tests

Parent commit moved needed functions into misc so this test could use those.
This test is for parent's parent commit which fix checkout billing address
edition.

Part of #34396
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo