[python] fix to keep some existing parts of pyproject.toml - #3174

[python] fix to keep some existing parts of pyproject.toml#3174

Yuchao Yan (msyyc) merged 15 commits into

mainAzure/autorest.python:mainfrom

auto-microsoft-fix-proproject.tomlAzure/autorest.python:auto-microsoft-fix-proproject.tomlCopy head branch name to clipboard