PD-97 Add unit test to check CLI/pypfb import

[paulineribeyre]

Regression test for:

Traceback (most recent call last):
  File "/Users/kyle/.pyenv/versions/3.13.4/bin/gen3", line 5, in <module>
    from gen3.cli.__main__ import main
  File "/Users/kyle/.pyenv/versions/3.13.4/lib/python3.13/site-packages/gen3/cli/__main__.py", line 9, in <module>
    import gen3.cli.pfb as pfb
  File "/Users/kyle/.pyenv/versions/3.13.4/lib/python3.13/site-packages/gen3/cli/pfb.py", line 2, in <module>
    from pfb import cli as pfb_cli
  File "/Users/kyle/.pyenv/versions/3.13.4/lib/python3.13/site-packages/pfb/cli.py", line 63, in <module>
    for ep in entry_points().get("pfb.plugins", []):
              ^^^^^^^^^^^^^^^^^^

Link to JIRA ticket if there is one: https://ctds-planx.atlassian.net/browse/PD-97

New Features

Breaking Changes

Bug Fixes

Improvements

Dependency updates

Deployment changes

[github-actions]

The style in this PR agrees with black. ✔️

This formatting comment was generated automatically by a script in uc-cdis/wool.

[github-actions]

filepath	passed	skipped	SUBTOTAL
tests/test_presigned_url.py	7	0	7
tests/test_graph_submit_and_query.py	13	1	14
tests/test_data_upload.py	8	1	9
TOTAL	28	2	30

Please find the detailed integration test report here

Please find the Github Action logs here