feat: add ZFS kmod support for CCOS

[gerblesh]

Documenting some of the ideas from: centos-workstation/homeserver#12
Curious about how we should go about ZFS support, should we copy all of the tags over from ucore? It looks like most of the technical work for zfs is done in the PR

[bsherman]

The CCOS repo/builds are meant to be a somewhat neutral upstream, like RCOS or FCOS themselves, before adding all our opinionated custom stuff.

I think this is what uCore should have been built on from the beginning, but we didn't know about it, so I'll be working on a way to change uCore builds to at least include a more stable option based on CCOS instead of FCOS.

As such, adding ZFS support doesn't belong in this repo, but once I get this going a bit further, I expect to add ZFS kmod builds for CCOS to our akmods builds.

[bsherman]

Instead of closing, I'm moving this issue to akmods repo, where we can track adding ZFS kmod builds.