Fedora 35 support was dropped, so we can update to a newer Go.
Stable RHEL 8 and 9 and Fedora 36 ships Go 1.18, so let's switch to it.
"//go:build" directives are now apparently enforced by go fmt, so that's why
there were added.
Also, all the github actions were adjusted to use Go 1.18.
Signed-off-by: Ondřej Budai <ondrej@budai.cz>
If a job is unresponsive the worker has most likely crashed or been shut
down and the in-progress job been lost.
Instead of failing these jobs, requeue them up to two times. Once a job is lost
a third time it fails. This avoids infinite loops.
This is implemented by extending FinishJob to RequeuOrFinish job. It takes a
max number of requeues as an argument, and if that is 0, it has the same
behavior as FinishJob used to have.
If the maximum number of requeues has not yet been reached, then the running
job is returned to pending state to be picked up again.
This introduces an expiry date (default: 14 days from insert date) and
adjust the service-maintenance script to delete jobs that are older than
the expiration date.
