fix the relevancy of tests failing on centos stream
    
    Apparently, the first attempt to adjust the relevancy was not
    complete. So here is another one.
    Certain tests should not be executed on centos-stream 8 or 9 at all,
    because packages required by those tests are not available there.
    Certain tests need to reflect the fact that SELinux policies which
    confine the tested programs are not present on all versions of RHEL,
    CentOS or Fedora.