[18.0][FIX] account_payment_*: test should only be executed after all modules have been installed

[xaviedoanhduy]

to resolve red CI of modules that depend on account_payment_*, for example: #1465

2025-05-15 06:00:07,580 391 ERROR odoo odoo.addons.account_payment_sale.tests.test_sale_order: ERROR: TestSaleOrder.test_change_sale_company
Traceback (most recent call last):
  File "/opt/odoo-venv/lib/python3.10/site-packages/odoo/addons/account_payment_sale/tests/test_sale_order.py", line 130, in test_change_sale_company
    other_company = self.env["res.company"].create({"name": "other company"})

2025-05-15 06:00:02,595 391 ERROR odoo odoo.tests.suite: ERROR: setUpClass (odoo.addons.account_payment_mode.tests.test_account_payment_mode.TestAccountPaymentMode)
Traceback (most recent call last):
  File "/opt/odoo-venv/lib/python3.10/site-packages/odoo/addons/account_payment_mode/tests/test_account_payment_mode.py", line 24, in setUpClass
    cls.company_2 = cls.env["res.company"].create({"name": "Company 2"})

[pedrobaeza]

/ocabot merge patch

[OCA-git-bot]

This PR looks fantastic, let's merge it!
Prepared branch 18.0-ocabot-merge-pr-1467-by-pedrobaeza-bump-patch, awaiting test results.

[OCA-git-bot]

Congratulations, your PR was merged at 36adb6c. Thanks a lot for contributing to OCA. ❤️