Modernize executable names
Rename the Python-versioned executables not to start with "python"
(if you have python3-mako installed and you type python[tab], it gets in the way)
Make mako-render Python 3 on Fedora 32+
See https://fedoraproject.org/wiki/Changes/Python_means_Python3
(arguably, this is correct for F31 as well, but the timing is not good for that)