refactor: create setup.cfg

[SauravMaheshkar]

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🚨 Issue number

Fixes #2976

📝 What does this PR do?

This PR aims to work on the issues reported in #3016 and #3012. pyproject.toml would lead to a isolated build whereas setup.cfg should not.

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[FrankLeeeee]

Hi @SauravMaheshkar , please see #3022 for why setup.cfg is not recommended for this project.

[SauravMaheshkar]

Hi @SauravMaheshkar , please see #3022 for why setup.cfg is not recommended for this project.

Oh I didn't know setup.cfg had already been considered as an option.