Fix cli for Python 3.7 - tar.add(exclude=) has been deprecated

[cfregly]

  File "/root/miniconda3/bin/pipeline", line 11, in <module>
    sys.exit(_main())
  File "/root/miniconda3/lib/python3.7/site-packages/cli_pipeline/cli_pipeline.py", line 5734, in _main
    _fire.Fire()
  File "/root/miniconda3/lib/python3.7/site-packages/fire/core.py", line 127, in Fire
    component_trace = _Fire(component, args, context, name)
  File "/root/miniconda3/lib/python3.7/site-packages/fire/core.py", line 366, in _Fire
    component, remaining_args)
  File "/root/miniconda3/lib/python3.7/site-packages/fire/core.py", line 542, in _CallCallable
    result = fn(*varargs, **kwargs)
  File "/root/miniconda3/lib/python3.7/site-packages/cli_pipeline/cli_pipeline.py", line 1470, in resource_upload
    absolute_path,
  File "/root/miniconda3/lib/python3.7/site-packages/cli_pipeline/cli_pipeline.py", line 2786, in model_archive_tar
    tar.add(model_path, arcname=_model_subdir_name, exclude=exclude_file, filter=_filter_tar)
TypeError: add() got an unexpected keyword argument 'exclude'