In order to install particular python versions on distros that
don't otherwise have them, add an option for installing via
pyenv.
The packages to be installed to allow for Python to be built were
tested on the official Docker containers so they should provide
a fair amount of coverage from a minimal environment.
Co-Authored-By: Mohammed Naser <mnaser@vexxhost.com>
Change-Id: Ic3312458b499a4b743895fa5829bb25155f77654
e71d0d2607