Drop sudo from image related commands

Assume that the CI (and local) user has permission to execute
`docker` commands directly. By doing so, we also support the
`docker` podman alias (provided by the `podman-docker` package).

refs https://stackoverflow.com/questions/60460705
refs https://packages.ubuntu.com/search?keywords=podman-docker
refs https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/building_running_and_managing_containers/assembly_starting-with-containers_building-running-and-managing-containers