lxd/device/nic/ovn: d.network.InstanceDevicePortSetup and d.network.InstanceDevicePortDelete usage in Start()
lxd/device/nic/ovn: d.network.InstanceDevicePortSetup and d.network.InstanceDevicePortDelete usage in Start()

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

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