A comment added in the original commit suggests these were only used as
more up-to-date versions relative to those in nixpkgs. That's no longer
the case and I'm not sure there's good reason to maintain theme here.
I'm happy to reconsider but will remove them for now.
This is a relatively large re-design which
- removes usage of the Helm CLI
- expects users to override the default package
- performs an interactive diff, confirm, apply by default
- prunes removed resources
