There's a merged pull request on the void-packages repository

syncthing-gtk: restore sane versioning, fix tests
https://github.com/void-linux/void-packages/pull/35586

Description:
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cc @paper42 

#### Testing the changes
- I tested the changes in this PR: **briefly**

The new debian version scheme did throw errors like
```
/usr/lib/python3.10/site-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning: v0.9.4.4-ds-git20220108-9023143f8b93 is an invalid version and will not be supported in a future release
```

This PR restores the old versioning scheme by adding the the following precautions:
* Users on `0.9.4.4` get upgraded to this version due to revision (last in this scheme was 3)
* Users on `0.9.4.4+ds+git20220108+9023143f8b93` get reverted to the old versioning scheme but on this revision

On top of that I added some `checkdepends` to make the checks succeed atleast to a certain point. I'm totally unsure why this wasn't an issue in the past, did anything change there? However, I'm stuck with the check error as seen on CI. Help appreciated.

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