netmiko_devices should support config switch by local_link_information, not just by config_file.

[Zachary Ma]

At first, see the local_link_information of the port
"port": {
    <all other fields>,
    "vnic_type": "baremetal",
    "host_id: <Ironic node UUID>,
    "binding:profile": {
      "local_link_information": [
        {
          "switch_id": xxx,
          "port_id": xxx,
          "switch_info": zzz,
          <optional more information>
        },
We can add 'switch ip address'、'ssh root and password' in local_link_information,
and the networking-generic-switch plugin can get the information about the switch with binding port.

So, it's enough to configure switch by local_link_information.