(new) non-ASCII filenames break unit tests on Linux

[Rene Engelhard]

Hi again,

for advoidance of doubt:

I said:

 > I think this change should be reverted.

I mean:

>  From 8a0015c35f3f137e4f3a80e40616bc078e265a1c Mon Sep 17 00:00:00 2001
> From: Mike Kaganski <mike.kaganski at collabora.com>
> Date: Fri, 1 Dec 2023 16:43:49 +0300
> Subject: Drop allownonascii check from pre-commit checks

That one should be reverted I guess.

>  From a5a49657dc17609a05dca59a8521fd71d14fe76e Mon Sep 17 00:00:00 2001
> From: Mike Kaganski <mike.kaganski at collabora.com>
> Date: Fri, 1 Dec 2023 16:48:44 +0300
> Subject: tdf#158442: fix opening hybrid PDFs on Windows

That one at least fix the filename. Testing this otherwise is worthwile 
I guess.

Regards,

Rene