oci-registry-prune: New playbook to prune old OCI images from the candidate registry.
    
    This commit adds a new module and a new playbook used to delete images
    from the candidate-registry that are older than 30 days.
    The module looks for images tags that are older than 30 days and delete the
    tags.
    The playbook run the module and the registry garbage collection to reclaim
    the disk space.
    
    Signed-off-by: Clement Verna <cverna@tutanota.com>