Move os-{apply,collect}-config to python3-jobs

Now that both os-apply-config and os-collect-config support Python 3,
drop the non-voting job, and switch to the python3-jobs template.

Change-Id: Ie7f8187cc33299624bb165f5f865cdda03ce0d98
Merge "Move os-{apply,collect}-config to python3-jobs"