[python-win32] Using relative python path in exe files generated by `ScriptMaker`

[Ilya Kazakevich]

Hello,

Thank you all. We run tests on CI and we need both Windows and Linux machines.
We do not want to spend time installing lots of packages (we have lots
of them) each time on each run (agents are shared and cleaned up after
each run), so we use Docker on Linux. However, for Windows we can't do
that, so we decided to create a `zip` archive and download it on
agent. It works and it is pretty fast, and `python.exe` itself is
portable. The only problem is those scripts like `poetry.exe`.