Fix: other flags may not be combined with --rollback

[AliRezaBeitari]

As stated here, you should not pass other flags with the --rollback flag. Otherwise, you will get this error message:

other flags may not be combined with --rollback

And this error causes the shepherd container to exist with a non-zero exit code:

ID             NAME             IMAGE                       NODE   DESIRED STATE   CURRENT STATE            ERROR                       PORTS
mt76rdcbfaaz   shepherd.1       mazzolino/shepherd:latest   main   Running         Running 13 minutes ago
j1hi6zqylbdn    \_ shepherd.1   mazzolino/shepherd:latest   main   Shutdown        Failed 13 minutes ago    "task: non-zero exit (1)"
xyj7e0r52vog    \_ shepherd.1   mazzolino/shepherd:latest   main   Shutdown        Failed 3 hours ago       "task: non-zero exit (1)"
vd0nvzo9kd2y    \_ shepherd.1   mazzolino/shepherd:latest   main   Shutdown        Failed 4 hours ago       "task: non-zero exit (1)"
53azr021ok4i    \_ shepherd.1   mazzolino/shepherd:latest   main   Shutdown        Failed 4 hours ago       "task: non-zero exit (1)"

For this reason, I removed the --no-resolve-image and --with-registry-auth flags from the rollback command.

[moschlar]

I have additionally checked about the $detach_option by looking through docker/cli#144 and it seems to be good now!