[FIX] payment_paypal: ignore exception in sentry for missing notification data.

ValidationError: PayPal: Missing value for txn_id (78X739757D473425R) or
txn_type (None).

This issue occurs when there is some missing value in the received
notification_data while evaluating the '_process_notification_data' function.
It raises an Exception which will be caught by the sentry.

sentry-3954375754

closes odoo/odoo#123191

X-original-commit: 8c539133f374ad709b5ed7770b15a3233e2463b2
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

addons/payment_paypal/controllers/main.py

@@ -173,7 +173,9 @@ class PaypalController(http.Controller):
             # Handle the notification data
             tx_sudo._handle_notification_data('paypal', data)
         except ValidationError:  # Acknowledge the notification to avoid getting spammed
-            _logger.exception("unable to handle the notification data; skipping to acknowledge")
+            _logger.warning(
+                "unable to handle the notification data; skipping to acknowledge", exc_info=True
+            )
         return ''
 
     @staticmethod