Stop upgrading pip/setuptools on install.
Review Request #12719 — Created Nov. 10, 2022 and submitted
We also no longer upgrade
setuptools. This used to be needed
back when these were heavily transitioning to modern packaging
capabilities in the Python 2 era. Nowadays they do more harm than good,
particularly with some
pipbugs that can remove incorrect versions of
Successfully installed packages in a brand-new development environment.