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Fix issue #901: Failing PEFT integration tests by reversing PR#867 from jph00/patch-2

tests.

This reverts commit 2ee289fb, reversing
changes made to 744d36f7.

Fix for 4bit without compress_statistics.

chore: update dev setup

Avoid double-quantizing when calling `cuda()`

Update env_vars.py to include GOOGLE_VM_CONFIG_LOCK_FILE

Update cuda_install.sh

Add option to download and install Cuda 12.3

See this comment: https://github.com/TimDettmers/bitsandbytes/issues/620#issuecomment-1666014197

adding this variable to be ignored allows the bitsandbytes import and setup to proceed on a GCP VM in a jupyter notebook.

fixes to recent PR #753

Fix typehint error

Save and load  in NF4 / FP4 formats