Add validate nouveau whether in blacklist

[lengrongfu]

When i use preinstalled drivers are on host. other components may fail because user did not disable nouveau driver.

[cdesiniotis]

Hi @lengrongfu, how do you propose we validate that nouveau is blacklisted?

[lengrongfu]

We can exec lsmod | grep nouveau in driver validating container to check wheather result. if nouveau not in blacklisted, we can stop the subsequent process.

NVIDIA/k8s-driver-manager#37 As discussed in this issue, since blacklisting would require updating the initramfs and rebooting the node, so wen can to check nouveau already been added to the blacklist？