test if `sudo dnf` works for confined administrators
    
    A recently filed customer report revealed that SELinux prevents the
    confined administrator (derived from sysadm_u, having sysadm_r role)
    from running the "sudo dnf update" command. The TC reproduces the
    situation.
    
    Because BZ#1910077 was not fixed on the sudo side, various commands
    end up triggering SELinux denials and consequently, they need to be
    fixed on the selinux-policy side. It is an unfortunate solution, but
    a necessary one if we want to achieve a successful run of such commands.
    
    The TC covers BZ#2233065 and RHEL-1679.