switch to negativo17 for nvidia akmod

[bsherman]

It seems RPMfusion has dropped the 470 driver ( https://admin.rpmfusion.org/pkgdb/package/nonfree/nvidia-470xx-kmod/ ). So, it may be time to switch to negativo17 for nvidia.

@KyleGospo and I have previously discussed this. The negativo17 packaging allows more granular installation of only desired components. For example, in ucore I already use negativo17 as it allows only installing nvidia-driver-cuda which is just the driver and CUDA support, as is proper for a server. RPMfusion's package pulled in all of Xorg and Wayland. In addition, negativo17 provides a cuda-gcc package to aid users needing (nvidia's CUDA does not yet support GCC 14 which is current in Fedora).

We were not keen to move to negativo17 before now, but because they only package the latest drivers, while we were using both latest and legacy 470 drivers from RPMfusion.

With RPMfusion's orphaning of the 470 package, I believe we should now move to negativo17. This will mean dropping the 470 driver... but it's orphaned upstream, so I unless we want to maintain the package, I don't think we can continue providing it in good conscience.

I'll prep the appropriate PRs for this.