CI with `pytest_num_workers=8` for torch/tf jobs (#25274)

n8
Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

.circleci/create_circleci_config.py

@@ -285,7 +285,6 @@ torch_job = CircleCIJob(
         "pip install -U --upgrade-strategy eager git+https://github.com/huggingface/accelerate",
     ],
     parallelism=1,
-    pytest_num_workers=3,
 )
 
 
@@ -298,7 +297,6 @@ tf_job = CircleCIJob(
         "pip install -U --upgrade-strategy eager tensorflow_probability",
     ],
     parallelism=1,
-    pytest_num_workers=6,
 )