GitLab

* Add bitsandbytes support for gpt2 models

* Guard Conv1D import to pass tensorflow test

* Appease ruff linter

* Fix 4bit test and remove int8 test boilerplate

* Update tests/bnb/test_mixed_int8.py
Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>

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Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>

fix bitsandbytes import issue