improve install guide to include better validation information

[a-mccarthy]

The install guide currently doesn't have details to show a successful deploy.

We should update the docs to include more details about this

include success output:

kubectl get pod -n gpu-operator
NAME                                                              READY   STATUS      RESTARTS   AGE
gpu-feature-discovery-lhvpp                                       1/1     Running     0          20h
gpu-operator-1779923295-node-feature-discovery-gc-6cb68c45qd52p   1/1     Running     0          20h
gpu-operator-1779923295-node-feature-discovery-master-65dbw4c5b   1/1     Running     0          20h
gpu-operator-1779923295-node-feature-discovery-worker-jnkks       1/1     Running     0          20h
gpu-operator-6f65b7c67d-d8xkk                                     1/1     Running     0          20h
nvidia-container-toolkit-daemonset-j6w9t                          1/1     Running     0          20h
nvidia-cuda-validator-znxct                                       0/1     Completed   0          20h
nvidia-dcgm-exporter-sgg84                                        1/1     Running     0          20h
nvidia-device-plugin-daemonset-fmvxj                              1/1     Running     0          20h
nvidia-driver-daemonset-lm9vq                                     1/1     Running     0          20h
nvidia-mig-manager-4lv9x                                          1/1     Running     0          20h
nvidia-operator-validator-bl2g2                                   1/1     Running     0          20h

a general time estimate for deploy and factors that may impact this.