Use nvidia runtime handler for the daemonset

[harche]

NVIDIA/gpu-operator#1578 PR broke DAS operator daemonset, so now we need to set runtimeClassName: nvidia going forward for DAS operator daemonset since all access to the gpu is handled by using CDI which handles mounting the required nvml libraries.

For testing, If I set NVIDIA_RUNTIME_SET_AS_DEFAULT=true in driver took in gpu cluster policy, DAS daemonset pod starts working again,

% oc get pods -n das-operator
NAME                                    READY   STATUS    RESTARTS       AGE
das-daemonset-2f9r4                     1/1     Running   10 (11m ago)   32m
das-operator-67598957b7-xqng7           1/1     Running   0              33m
das-operator-67598957b7-zqbt2           1/1     Running   0              33m
das-operator-webhook-55c7778587-5mpj8   1/1     Running   0              32m
das-operator-webhook-55c7778587-tbzls   1/1     Running   0              32m
das-scheduler-67dccd6f9f-bd8xd          1/1     Running   0              32m
das-scheduler-67dccd6f9f-sqvpl          1/1     Running   0              32m

Fixes : https://issues.redhat.com/browse/OCPBUGS-65805

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[harche]

/test e2e-bundle-4-19-runc

[harche]

/test e2e-bundle-runc

[harche]

/test e2e-bundle-runc

[harche]

/test e2e-bundle-4-19-runc

[harche]

/test e2e-bundle-runc

[openshift-ci]

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[rphillips]

/lgtm