Warn once when a hub-kernel function falls back to its reference PyTorch path (#48185)
* Warn once when a hub-kernel function falls back to its reference PyTorch path
* Name the pip distribution for causal_conv1d too
* Keep the logger out of traced graphs, drop the distribution map
* Trim the comments
* Move the distribution name next to its only use
* Say how much slower the reference path is
* Reword the comment to say what the code does
* Update src/transformers/integrations/hub_kernels.py
Co-authored-by: Anton Vlasjuk <73884904+vasqu@users.noreply.github.com>
* Move the distribution alias next to the internal path mapping
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Co-authored-by: q <q@h>
Co-authored-by: Anton Vlasjuk <73884904+vasqu@users.noreply.github.com>