message: Fix convert_variables_to_constants_v2 for scalar valued captures
  tensor.numpy() can return a scalar, not a numpy array.
diff: @@ -823,7 +823,7 @@ class _FunctionConverterData(_ConverterData):
  if idx in map_index_to_variable:
  data = map_index_to_variable[idx].numpy()
  else:
  - data = val_tensor.numpy()
  + data = np.array(val_tensor.numpy())
  self._tensor_data[tensor_name] = _TensorData(
  numpy=data,
  dtype=dtypes.as_dtype(data.dtype).as_datatype_enum,
  