Use NVIDIA_CDI_HOOK_PATH instead of NVIDIA_CTK_PATH

[elezar]

Instead of relying on the nvidia-ctk binary as the hook implementation, we should move to using nvidia-cdi-hook. This only implements the required CDI hooks.

We would need to:

• Use the NVIDIA_CDI_HOOK_PATH envvar
• Rename / replace the helm option
• Rename local references

Note that we already use WithNVIDIACDIHookPath when instantiating the nvcdi library instance: https://github.com/NVIDIA/k8s-dra-driver/blob/32805fec62d6b3269e75ddb0eddeaa5c4d214564/cmd/nvidia-dra-plugin/cdi.go#L106