Move smoke tests for wheel creation to a separate job

[A5rocks]

This should save ~15 seconds (based on a recent run) because it prevents all other CI jobs from starting.

[Ripan-Roy]

Hey!
I noticed this issue hasn’t been updated in a while. I’d like to pick it up if it’s still relevant. Could you please assign it to me, or confirm whether any recent changes affect it?

[A5rocks]

No need for assignment (I'll add you as an assignee anyways...), but yes this is still relevant.