disconnected workers should fail or reconnect

[h01ger]

<h01ger> jochensp: do you see why there are only 3 ppc64el builds atm? both workers seem fine
<jochensp> it got disconnected and @2 also builds gcc-12
< jochensp> so on o6, run: systemctl restart rebuilderd-worker@1.service
<h01ger> ah, thx. and why systemctl --failed didnt show it?
<jochensp> it did not fail
<h01ger> ah, then: why is disconnect not a failure? :)
<jochensp> good question, maybe fill a bug with rebuilderd

[h01ger]

disconnected workers should fail - or simply just reconnect!