* Bumps bootstrapped python version to 3.7.9 (#64246)
From quick test all our helper scripts work fine on 3.7.
Why 3.7.9 instead of latest 3.7.12 ? Embed zips for these versions are missing from python.org ftp. (They apparently do not ship binaries for security-fix only releases)
* Bumps bootstrapped python version to 3.7.9
Co-authored-by: AnturK <AnturK@users.noreply.github.com>
