Standalone version: use the same executable on Windows 7+

[PierreRaybaut]

Currently, if you want to use DataLab stand-alone version on Windows 7, you have to install the specific '-Win7' build which is based on Python 3.8.

Given the fact that Python 3.8 is now deprecated, it would be nice to have the same build running on Windows 7 as on Windows 10-11 (currently this build is based on Python 3.11).

One way to do this could be to:

1. Distribute only the Python 3.11-based version
2. Add a documentation page on how to make your Windows 7 install compatible with Python 3.9+ (using for example this hack).