Use Input OOB authentication. Provisioner only. Instruct the unprovisioned device to use the specified Input OOB authentication action. When using BT_MESH_PUSH, BT_MESH_TWIST or BT_MESH_ENTER_NUMBER, the
bt_mesh_prov
::output_number callback is called with a random number that has to be entered on the unprovisioned device. When using BT_MESH_ENTER_STRING, the
bt_mesh_prov
::output_string callback is called with a random string that has to be entered on the unprovisioned device.