Add repos for gpu and mlx install to kickstart file in Rocky 8 (#2405)
* Remove gpu and mlx install from kickstart file
We will be installing directly from CIQ repos once they're ready anyway
* Add CIQ repos for Nvidia and Mlx drivers
* Add dnf install commands to repos added in previous commit
* Replace preview Rocky 9 workflows with final workflows
Also cleaning up old workflow files for preview builds
* Fix missing EOM
* Fix naming of workflows
More concise, but still clear
* Add cuda repos for kickstart configs
* Fix missing EOM
* Install nvidia-accelerated-graphics-driver with kickstart
