Example of fuse with knight dataset does not work with cpu

[agiova]

Describe the bug\ Example folder: examples/fuse_examples/imaging/classification/knight/baseline After setting the config.yaml with num_gpus : 0, this error follows:

Failed to run nvidia-smi
Traceback (most recent call last):
  File "/[..]/fuse-med-ml/examples/fuse_examples/imaging/classification/knight/baseline/fuse_baseline.py", line 221, in <module>
    main(config_path)
  File "/[..]/fuse-med-ml/examples/fuse_examples/imaging/classification/knight/baseline/fuse_baseline.py", line 106, in main
    GPU.choose_and_enable_multiple_gpus(cfg["num_gpus"], force_gpus=None)
  File "/[..]/fuse-med-ml/fuse/utils/gpu.py", line 74, in choose_and_enable_multiple_gpus
    raise Exception("could not auto-detect available GPUs")
Exception: could not auto-detect available GPUs

FuseMedML version\ commit https://github.com/BiomedSciAI/fuse-med-ml/commit/6a90bf3af9ca3724ae2882b717bc134ac3a930e3

Python version\ Python 3.9.13

To reproduce\ Following steps:

• Modify config.yaml with num_gpus : 0
• (set env variables)
• Execute examples/fuse_examples/imaging/classification/knight/baseline/fuse_baseline.py

Expected behavior\ Script should not search GPUs if config.yaml with num_gpus : 0.

[agiova]

fixed with PR #173