FIX: re-add bnb on docker image (#30427)

Update Dockerfile

docker/transformers-all-latest-gpu/Dockerfile

@@ -45,6 +45,9 @@ RUN python3 -m pip install --no-cache-dir git+https://github.com/huggingface/opt
 # For video model testing
 RUN python3 -m pip install --no-cache-dir decord av==9.2.0
 
+# Some slow tests require bnb
+RUN python3 -m pip install --no-cache-dir bitsandbytes
+
 # For `dinat` model
 # The `XXX` part in `torchXXX` needs to match `PYTORCH` (to some extent)
 RUN python3 -m pip install --no-cache-dir natten==0.15.1+torch220$CUDA -f https://shi-labs.com/natten/wheels