fix(alert_rules): Fix bug where stack trace is returned as a toast error in alert rules (#19027)
fix(alert_rules): Fix bug where stack trace is returned as a toast error in alert rules (#19027)

We unintentionally returned the whole snuba stack trace when we errored while attempting to validate
a rule. This changes the code to log to sentry and then return a user friendly message
beeftornado/sentry,beeftornado/sentry,beeftornado/sentry