Fix container labels

[jcpunk]

In the container produced from the UBI9 base image, a number of default labels are provided. These should probably be overridden by CVMFS-CSI specific values.

Example of current labels at : https://registry.cern.ch/harbor/projects/26/repositories/cvmfs-csi/artifacts-tab/artifacts/sha256:c41377f2af87b0e076d9f4394b0e0b2b6d82d2a837869d6c5204fa1f22aad4e2

[gman0]

Hi @jcpunk, for now we're providing the org.opencontainers.image labels:

https://github.com/cvmfs-contrib/cvmfs-csi/blob/release-2.2/deployments/docker/Dockerfile#L18-L31

UBI9 image defines some labels that will need to be set to empty value, as they are not relevant to us.