Change default LANG to C.UTF-8

Filip Hejsekrequested to merge
filip-hejsek/filesystem:filip-hejsek-main-patch-42814 into main

The C locale does not support unicode. Nowadays we should be supporting unicode by default.

We can use the C.UTF-8 locale instead. C.UTF-8 is included in the glibc package so it should always be available on the system.

Merge request reports