mocks: Filesystem: Update noop device to work with MediaLibrary::media(std::string)
mocks: Filesystem: Update noop device to work with MediaLibrary::media(std::string)

We need a basic device and mountpoint to fetch a media through its path

chouquette/medialibrary,chouquette/medialibrary,chouquette/medialibrary,chouquette/medialibrary