[ `PretrainedConfig`] Improve messaging (#27438)
* import hf error
* nits
* fixup
* catch the error at the correct place
* style
* improve message a tiny bit
* Update src/transformers/utils/hub.py
Co-authored-by: Lucain <lucainp@gmail.com>
* add a test
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Co-authored-by: Lucain <lucainp@gmail.com>
