Automated test failed to configure lagg0 without failover VHID

We had that regression in the pass in NAS-106366. The UI HA automated test unable to create the lagg0 interface without failover VHID on 12.0.

Error: Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 137, in call_method
    result = await self.middleware._call(message['method'], serviceobj, methodobj, params, app=self,
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1195, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/local/lib/python3.8/site-packages/middlewared/service.py", line 455, in create
    rv = await self.middleware._call(
  File "/usr/local/lib/python3.8/site-packages/middlewared/main.py", line 1195, in _call
    return await methodobj(*prepared_call.args)
  File "/usr/local/lib/python3.8/site-packages/middlewared/schema.py", line 973, in nf
    return await f(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/network.py", line 821, in do_create
    await self._common_validation(verrors, 'interface_create', data, data['type'])
  File "/usr/local/lib/python3.8/site-packages/middlewared/plugins/network.py", line 1122, in _common_validation
    if not data['failover_vhid'] and data['failover_group']:
KeyError: 'failover_vhid'