Fix `SmolVLM` video processor `resize` using wrong interpolation after backend refactor (#45258)
* Fix SmolVLM video processor resize using wrong interpolation after image processor backend refactor
The PR #43514 refactored _preprocess to pass resample=resample to resize,
but resize still accepted interpolation as its parameter. The resample kwarg
was silently swallowed by **kwargs, causing interpolation to default to BILINEAR
instead of the intended LANCZOS->BICUBIC path, producing ~0.36 difference in pixel_values.
Fix by renaming the parameter to resample and converting PIL resample integers to
torchvision InterpolationMode via pil_torch_interpolation_mapping, matching the
pattern used in TorchvisionBackend.resize.
* fix
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Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>