build: prefer python 3 over 2 for configure

Change python search order to python3*, then python, then python2*.

PR-URL: https://github.com/nodejs/node/pull/30091


Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: João Reis <reis@janeasystems.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>