Routine automated backups

[Cervator]

As part of the 2023 overhaul I aim to at least take GKE-level backups of the disks for the major tools after final deployment (Jenkins and Artifactory at least). There are a variety of options for routine backups - although the new IaC/CaC focus takes a huge bite out of just redeploying from scratch and being able to get up to speed fairly fast. Still, it would be unnecessary pain to lose all history in Jenkins and especially Artifactory, where we might also have a few manually published artifacts that snuck in over the years.

There are plugins for the individual apps as well as GKE-provided backups but I'm unsure about which options to pick.

Another related option would be to offload binaries to cloud-provided storage buckets rather than local / persistent disks, those are backed up at the cloud-provider level and may be secure enough to only worry about having the config in a good place.