While updating to 23.0.9/24.0.5[1], it was discovered that Nextcloud
silently changes db passwords in some cases (in case of MySQL in **all**
now).
This is inherently incompatible with our module. Further context is
provided in the patch file attached to this commit.
[1] https://github.com/NixOS/nixpkgs/pull/190646, see comments below
