Runner: runner-ubi-images to distroless

Summary

We must convert the final images, in a downstream repository, to operate on the distroless / ubi-micro pattern as well.

Details

It was discovered late in the process that the final UBI / FIPS images from Runner are actually produced via https://gitlab.com/gitlab-org/ci-cd/gitlab-runner-ubi-images

These images currently behave as though they are based upon ubi-minimal, and make several calls to that account. These must be refactored to account for the newly implemented pattern.