Fix : adding einops lib in the CI docker for some bitsandbytes tests (#35652)

* fix docker

* fix

Author: MekkCyber

docker/transformers-all-latest-gpu/Dockerfile

@@ -65,6 +65,9 @@ RUN python3 -m pip install --no-cache-dir python-Levenshtein
 # For `FastSpeech2ConformerTokenizer` tokenizer
 RUN python3 -m pip install --no-cache-dir g2p-en
 
+# For Some bitsandbytes tests
+RUN python3 -m pip install --no-cache-dir einops
+
 # When installing in editable mode, `transformers` is not recognized as a package.
 # this line must be added in order for python to be aware of transformers.
 RUN cd transformers && python3 setup.py develop