ncm-network: nmstate backend bonding option 'arp_ip_target' needs to be a string.

[aka7]

currently arp_ip_target is a list, nmstate doesn't like this, throws following error Provide file is not valid NetworkState or NetworkPolicy: invalid type: sequence, expected a string arp_ip_target in nmstate appears to be string, looks like nmstate accepts comma separated ip as string. so instead of

  link-aggregation:
    mode: active-backup
    options:
      arp_ip_target:
      - 1.1.1.1

it should be

  link-aggregation:
    mode: active-backup
    options:
      arp_interval: '8000'
      arp_ip_target:  '1.1.1.1, 1.1.2.1'
etc.

• The version of the component you are using (rpm -q $component) nmc-network-23.6.0

• What OS version you are using (/etc/redhat-release or similar) rhel 9.3

• Steps required to reproduce the problem add bonding opts for arp_ip_target for bond0, i.e

  /system/network/interfaces/bond0/bonding_opts
  /system/network/interfaces/bond0/bonding_opts/arp_ip_target
  /system/network/interfaces/bond0/bonding_opts/arp_ip_target/0 = 1.1.1.1

  this will create /etc/nmstate/bond0.yml with

  link-aggregation:
    mode: active-backup
    options:
      arp_ip_target:
      - 1.1.1.1

• Actual result versus expected result

  link-aggregation:
  mode: active-backup
  options:
    arp_ip_target: 1.1.1.1