bug(os): Installer changes UID of existing /$HOME/.config/

[iconoclasthero]

Rhino Linux Version:
2023.4

Platform:
x86-64

Describe the bug
After installing I logged into my existing Ubuntu install and everything was broken because the UID for $HOME/.config was changed by the installer.

To Reproduce
Steps to reproduce the behavior:
Install with an existing /home partition

Expected behavior
If the UID of $HOME/.config does not match that of what Rhino is going to change it to, it needs to throw an error and stop the install.

[ajstrongdev]

This seems like it could possibly be a problem with upstream calamares

[oklopfer]

calamares/calamares#2302

[oklopfer]

calamares/calamares#526

[iconoclasthero]

based on the discussion at calamares, if the rhino-live user specified in iso:/casper/filesystem.squashfs:/etc/passwd was changed to UID 999, this would probably result in the first user being 1000.