[examples] fix sys.path in conftest.py (#11636)
[examples] fix sys.path in conftest.py (#11636)

* restore conftest.py

* fix conftest and make copies

* remove unneeded parts

* remove unwanted files
huggingface/transformers,huggingface/transformers,huggingface/transformers,huggingface/transformers,huggingface/pytorch-transformers