Replace the fpm gem for building .deb packages with the nfpm library embedded within goreleaser.

Modify the Makefile to prefer invoking goreleaser for all artifacts. Per the .github/workflows/release.yaml workflow: this Makefile isn't used during the release process, it's inherited cruft.

Moving this logic from the Makefile, which we don't use, to goreleaser, which we do use, means the next tagged release will have a .deb attached with provenance.

This PR also upgrades the dependencies specified in dev.yml: ruby and golang to fresher versions.

Testing Instructions

• make deb will produce dist/*.deb.
  • Re-running will recreate the build (not reuse): to fix that we'd have to git rev-parse instead of the VERSION file(?), and I don't want to do that.

Related

• Reference https://goreleaser.com/customization/nfpm/