message: [fx2trt] fix test failures
  Summary:
  Pull Request resolved:
  changes the default argument value of `value` in functional.pad from `0` to `None` which breaks fx2trt tests.
diff: @@ -261,7 +261,7 @@ def acc_ops_pad_with_padding_layer(
  input_val = kwargs["input"]
  pad = cast(Sequence[int], kwargs["pad"])
  mode = kwargs["mode"]
  - value = kwargs["value"]
  + value = kwargs["value"] if kwargs["value"] is not None else 0
  rank = len(input_val.shape) # type: ignore[union-attr]
  if not isinstance(input_val, TRTTensor):
  @@ -311,7 +311,7 @@ def acc_ops_pad_with_slice_layer(
  input_val = kwargs["input"]
  pad = cast(Sequence[int], kwargs["pad"])
  mode = kwargs["mode"]
  - value = kwargs["value"]
  + value = kwargs["value"] if kwargs["value"] is not None else 0
  rank = len(input_val.shape) # type: ignore[union-attr]
  if not isinstance(input_val, TRTTensor):
  