Add pad args to all padding transforms

[dlotfi]

While np_kwargs argument has been added to several padding transforms such as SpatialPad, BorderPad, DivisiblePad, ResizeWithPadOrCrop, some other padding transforms which use np.pad internally still don't have this argument, including: Zoom, RandZoom and CropForeground

It'd be really helpful if these transforms have np_kwargs as well. I precisely need to specify constant_values in RandZoom.

[Nic-Ma]

Hi @dlotfi ,

Thanks for the feature request.
Let me try to investigate it ASAP.

Thanks.

[rijobro]

@Nic-Ma in case it's useful for you, in the torch transform PR, I created Pad: https://github.com/Project-MONAI/MONAI/pull/2278/files#diff-8afde597f8842b2f703f8352542ddf5b5e9498d7ef8a998321cb40e5c008a6b1R61, which is then called by all padding transforms. This might help you if you want to unify the input parameters.

[Nic-Ma]

Hi @rijobro ,

Thanks for your sharing.
Currently, I will use the existing args np_args to keep it simple and consistent(only need to change around 5 lines code).
Please feel free to revisit all the crop / pad logic in your Tensor transform PRs later.

Thanks.