Use folders in cmake part2

[Dimon4eg]

First part here https://github.com/nextcloud/desktop/pull/3286

nextcloudsync will look in VS:

nextcloudCore will look in VS:

[nextcloud-desktop-bot]

AppImage file: Nextcloud-PR-3334-7600ed93555f1fcbaccbb0b8cd71afc5699fb882-x86_64.AppImage

To test this change/fix you can simply download above AppImage file and test it.

Please make sure to quit your existing Nextcloud app and backup your data.