[FIX] point_of_sale: don't equalitate a date and a datetime

Normally a `date` and a `datetime` compare `False`. For some reason
however a `datetime` and a `freezegun.api.FakeDate` compare equal as
long as the datetime's date part matches the fakedate's... until
Python 3.13, when it stop working.

I've no idea why it ever worked, but it's completely unnecessary, we
can just get the reference datetime's `date()` part and compare that
to the date.

upstream issue: spulec/freezegun#568

Author: xmo-odoo

addons/point_of_sale/tests/test_pos_basic_config.py

@@ -986,7 +986,7 @@ def _before_closing_cb():
             # Check the credit note
             self.assertTrue(return_to_invoice.account_move, 'Invoice should be created.')
             self.assertEqual(return_to_invoice.account_move.move_type, 'out_refund', 'Invoice should be a credit note.')
-            self.assertEqual(return_to_invoice.account_move.invoice_date, new_session_date, 'Invoice date should be the same as the session it is created in.')
+            self.assertEqual(return_to_invoice.account_move.invoice_date, new_session_date.date(), 'Invoice date should be the same as the session it is created in.')
             self.assertRecordValues(return_to_invoice.account_move, [{
                 'amount_untaxed': 30,
                 'amount_tax': 0,