Fix firstrun for user being created by dependency job

[asdil12]

Ticket: https://progress.opensuse.org/issues/166175
Fixes: #19964

[mloviska]

We came to a point that should have been avoided #19964 (comment)

[asdil12]

Still possible to do that - but after months of nothing happening my prio is fixing the rpi tests.

[mloviska]

Still possible to do that - but after months of nothing happening my prio is fixing the rpi tests.

Could have been fixed by simply replacing the module by boot_to_desktop. There is no need to reconfigure the published imaged by a predecessor job

[asdil12]

But I want to test firstboot on hardware.
That's the whole point of that test.
To test firstboot e.g. against a real wifi on real hardware.

The predecessor job runs in a VM and is just there to enable dhcp and ssh because interfacing via HDMI/USBHID doesn't really work well in our realhw setup.

[asdil12]

Untested so far:

#21132