[FIX] iap: avoid a crash when multiple accounts are found

Before the fix, if you had multiple accounts for a specific service, the
settings page was crashing.
(eg: for a service, you have one account specific to a company and
another account with no company set).

We now prefer accounts specific to the current company and tie-break on
the most recently created one

opw-2003744

closes odoo/odoo#33736

Signed-off-by: Pierre Rousseau (pro) <pro@odoo.com>

addons/iap/models/iap.py

@@ -162,7 +162,7 @@ class IapAccount(models.Model):
 
     @api.model
     def get(self, service_name, force_create=True):
-        account = self.search([('service_name', '=', service_name), ('company_id', 'in', [self.env.user.company_id.id, False])])
+        account = self.search([('service_name', '=', service_name), ('company_id', 'in', [self.env.user.company_id.id, False])], limit=1, order='company_id desc, id desc')
         if not account and force_create:
             account = self.create({'service_name': service_name})
             # Since the account did not exist yet, we will encounter a NoCreditError,