scylla_setup: fix --nic option on non-interactive mode
scylla_setup: fix --nic option on non-interactive mode

scylla_setup should not shows up NIC selection prompt on non-interactive mode.

Fixes #5725

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

scylladb/scylla,avikivity/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla