[bugfix] add 'tabulate' to the requirements.txt since the CLI cmd_list uses it

[kiukchung]

Fixes a bug introduced in https://github.com/pytorch/torchx/pull/579/files#diff-0aff65b8fe78257a723972926d63b801c495e54669248db41bed7536055aad92

Using tabulate in cmd_list.py but not adding it to requirements.txt causes torchx CLI to fail:

$ torchx runopts aws_batch

Traceback (most recent call last):
  File "/home/ubuntu/.pyenv/versions/venv39/bin/torchx", line 5, in <module>
    from torchx.cli.main import main
  File "/home/ubuntu/.pyenv/versions/3.9.13/envs/venv39/lib/python3.9/site-packages/torchx/cli/main.py", line 17, in <module>
    from torchx.cli.cmd_list import CmdList
  File "/home/ubuntu/.pyenv/versions/3.9.13/envs/venv39/lib/python3.9/site-packages/torchx/cli/cmd_list.py", line 11, in <module>
    from tabulate import tabulate
ModuleNotFoundError: No module named 'tabulate'

[d4l3k]

thanks for the fix!

[d4l3k]

@kiukchung can you sign the new CLA?

[codecov]

Codecov Report

Merging #627 (940b96d) into main (f61f22c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
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  Coverage   94.86%   94.86%           
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  Files          69       69           
  Lines        4832     4832           
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  Hits         4584     4584           
  Misses        248      248           

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