[arch-general] New nvidia drivers in testing

The new nvidia drivers have finally been released. They are in testing now for both architectures. I upload them completely untested, as my desktop is unaccessible until tomorrow. I dropped the libnvidia-wfb from the package, as it does the same as Xorg's libwfb and our xorg-server is sufficiently new (at least as far as I was told). Please report and working/non-working GPUs, I hope we can move this to extra soon.