minhtrung23:fix-pylint

[minhtrung23]

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[ledong0110]

@minhtrung23 cc @martinakaduc
In .github/workflow/python-package.yml

• You should use pip install -e . instead of pip install -r requirements.txt
• Package google-generativeai only supports python >= 3.9
• The unit tests execute on LLMs which require a lot of memory space, so it's infeasible to run the test on workflow