Linux Security policy remediations for backup files don't work on Debian

**Describe the bug**

The files just get backed up again using the original permissions. ChatGPT tells me you need to change the permissions via dpkg-staticoverrride:

```
sudo dpkg-statoverride --update --add root root 0644 /etc/group-
```

We currently try to do this with a temp file config and that doesn't work