ci: integration: Set an expiration on logs artifacts

ci: integration: Set an expiration on logs artifacts

The default expiry time is 30 days. Since the RPM artifacts coming from
the previous pipeline stages are set to expire in 1 day we can set the
failed integration job log artifacts to the same value. The sentiment
here is that if an integration job legitimately failed (i.e. not with
an infrastructure failure) unless it was fixed in the meantime it will
fail the next day with the scheduled pipeline again, meaning, that even
if the older log artifacts are removed, they'll be immediately
replaced with fresh ones.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>