[5.5] fix scheduling a non queueable job

[themsaid]

This fixes the breaking change in #21473 where onQueue() is called on a job that shouldn't be queued and thus it errors since the method isn't found.

[nebez]

Thanks for the fix, @themsaid! Took me a while to track this issue down after updating illuminate/console from v5.5.2 to v5.5.16.

Any idea when illuminate/console might get this fix? I see it's tagged in v5.5.19 of the framework but the console hasn't received a tag yet.