Offer minimal/distroless docker images

Is your proposal related to a problem?

(Write your answer here.)

Describe the solution you'd like

The Prometheus project recently offers distroless images to reduce the surface for CVEs.

It would be great, if Thanos could offer distroless images as well.

Describe alternatives you've considered

Images with FROM scratch should works as well - Thanos binary are static go binaries.

Additional context

See https://github.com/prometheus/prometheus/issues/8657