[bnb] Minor modifications (#18631)

* bnb minor modifications

- refactor documentation
- add troubleshooting README
- add PyPi library on DockerFile

* Apply suggestions from code review

Co-authored-by: Stas Bekman <stas00@users.noreply.github.com>

* Apply suggestions from code review

* Apply suggestions from code review

* Apply suggestions from code review

* put in one block

- put bash instructions in one block

* update readme

- refactor a bit hardware requirements

* change text a bit

* Apply suggestions from code review

Co-authored-by: Yih-Dar <2521628+ydshieh@users.noreply.github.com>

* apply suggestions

Co-authored-by: Yih-Dar <2521628+ydshieh@users.noreply.github.com>

* add link to paper

* Apply suggestions from code review

Co-authored-by: Stas Bekman <stas00@users.noreply.github.com>

* Update tests/mixed_int8/README.md

* Apply suggestions from code review

* refactor a bit

* add instructions Turing & Amperer

Co-authored-by: Stas Bekman <stas00@users.noreply.github.com>

* add A6000

* clarify a bit

* remove small part

* Update tests/mixed_int8/README.md

Co-authored-by: Stas Bekman <stas00@users.noreply.github.com>
Co-authored-by: Yih-Dar <2521628+ydshieh@users.noreply.github.com>

docker/transformers-all-latest-gpu/Dockerfile

@@ -46,7 +46,7 @@ RUN python3 -m pip install -U "itsdangerous<2.1.0"
 RUN python3 -m pip install --no-cache-dir git+https://github.com/huggingface/accelerate@main#egg=accelerate
 
 # Add bitsandbytes for mixed int8 testing
-RUN python3 -m pip install -i https://test.pypi.org/simple/ bitsandbytes==0.31.5
+RUN python3 -m pip install --no-cache-dir bitsandbytes
 
 RUN python3 -m pip install --no-cache-dir decord