🚨🚨🚨 [`Quantization`] Store the original dtype in the config as a private attribute 🚨🚨🚨 (#26761)
* First step
* fix
* add adjustements for gptq
* change to `_pre_quantization_dtype`
* Update src/transformers/modeling_utils.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
* fix serialization
* Apply suggestions from code review
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
* fixup
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Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>