Arvados

These calls don't do what you think and are deprecated in Python 3.12. The preferred way is datetime.datetime.now(tz=datetime.timezone.UTC).

Unfortunately http_to_keep does have a function that takes a utcnow argument, the value can be updated but not sure what we're going to do about the name. This was added relatively recently so we could maybe get away with a rename if we do it soon.