[BRLTTY] Support multiple Python versions on Windows

[Leonard de Ruijter]

Unfortunately, I can't get the thing to load on Python 3.11-32.

I'm getting the error: `ImportError: DLL load failed while importing 
brlapi: The specified module could not be found.`

On 9-10-2023 09:28, Dave Mielke wrote:
> [quoted lines by Leonard de Ruijter on 2023/10/09 at 07:56 +0200]
>
>> Would it be possible to provide a test build of the python bindings based on this pr?
> You can download one from: http://mielke.cc/~dave/brltty-win-6.6-24-libusb.zip
>