[Feature Request] Allow to configure CDI annotation prefix

[xiongzubiao]

This is to better support non-nvidia OCI runtimes in CDI mode. The gpu-operator uses nvidia.cdi.k8s.io as the default CDI annotation prefix. However, it requires to use Nvidia's container runtime. When using a non-nvidia OCI runtime, CRI-O or Containerd wants cdi.k8s.io prefix. Although one can edit the environment variables in the nvidia-container-runtime-daemonset and the nvidia-device-plugin-daemonset to achieve that, it is much easier that if the gpu-operator provides a chart config such as cdi.prefix.