Publish official linux syft (and friends) in a repo

[popey]

Syft, Grype and Grant have rpm and deb packages in the GitHub releases page, which is great.

However, that means users of those packages don't automatically get updates, as they might from a repo.

We should consider pushing all our debs and rpms to our own hosted repository so users can get updates without having to hunt them down from our releases page.

One option could be to publish to S3 using a tool like https://github.com/deb-s3/deb-s3

While we could work with Debian, Canonical, RedHat, Rocky or Alma, that would likely result over time in outdated releases of our software in stable releases, due to their publishing policies.