Rollup merge of #132694 - ismailarilik:fix/x/fix-a-regex-used-to-find-python-executable, r=jieyouxu

fix(x): fix a regex used to find python executable

Isn't the regex `^python[2-3]\.[0-9]\+$` wrong? It doesn't match, for example, with `python2.8`. There should be a plus sign at the end for a match, like `python2.8+`. I think `[0-9]+` is meant here instead of `[0-9]\+`. In that case a string like `python2.8` would match. This wasn't noticed because the script probably find and run the Python executable before this line.

Author: joboet