[FIX] payment: use commercial partner for payments made from payment acquirers

Payments made on eCommerce via a payment acquirer (i.e. Stripe) generate an
"account.payment" record where connected user's "child" partner is used for
partner_id of the payment, instead of commercial partner, as it is done for
payments registered on invoices.

For consistency, commercial partner should also be used for these payments.

opw-2457390

closes odoo/odoo#68065

X-original-commit: b738068be53621b23d9f19befdfdef50534ef434
Signed-off-by: Laurent Smet <smetl@users.noreply.github.com>
Signed-off-by: Anh Thao PHAM <kitan191@users.noreply.github.com>

addons/payment/models/payment_acquirer.py

@@ -680,7 +680,7 @@ class PaymentTransaction(models.Model):
             'amount': self.amount,
             'payment_type': 'inbound' if self.amount > 0 else 'outbound',
             'currency_id': self.currency_id.id,
-            'partner_id': self.partner_id.id,
+            'partner_id': self.partner_id.commercial_partner_id.id,
             'partner_type': 'customer',
             'journal_id': self.acquirer_id.journal_id.id,
             'company_id': self.acquirer_id.company_id.id,