[FIX] l10n_ar: Fix ImportError: No module named 'stdnum.ar.cbu'

Since stdnum.ar.cbu is not available in odoo saas enviroment because is
using an old version of stdnum package, we add a try exept in order to
catch this and manage the error properly which is raise an exception and
leave a message in the log telling the user that the cbu was not able to
validate.

closes odoo/odoo#40383

X-original-commit: 25d483fc3fc05fd47c72c3d96c02fed12b998b0d
Signed-off-by: Josse Colpaert <jco@openerp.com>

addons/l10n_ar/models/res_partner_bank.py

@@ -1,10 +1,18 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 from odoo import models, api, _
-import stdnum.ar.cbu
+from odoo.exceptions import ValidationError
+import stdnum.ar
+import logging
+_logger = logging.getLogger(__name__)
 
 
 def validate_cbu(cbu):
-    return stdnum.ar.cbu.validate(cbu)
+    try:
+        return stdnum.ar.cbu.validate(cbu)
+    except Exception as error:
+        msg = _("Argentinian CBU was not validated: %s" % repr(error))
+        _logger.log(25, msg)
+        raise ValidationError(msg)
 
 
 class ResPartnerBank(models.Model):