imagePullSecrets missing from snapshot controller

[dvyas1]

What happened:
csi-driver-nfs helm chart fails to install fully when using private registry csi-snapshot-controller image. The imagePullSecrets stub is not present in /csi-driver-nfs/templates/csi-snapshot-controller.yaml, therefore kubernetes fails to pull snapshot controller image from private registry.

What you expected to happen:
Kubernetes should be able to pull snapshot controller image from private registry.

How to reproduce it:

• Specific info about private registry in values.yaml of the helm chart.

    externalSnapshotter:
        repository: your-private-registry/snapshot-controller
        tag: v6.2.2
        pullPolicy: IfNotPresent

• Specify imagePullSecrets in values.yaml of the helm chart.

imagePullSecrets:
  - name: your-secret

• Install the helm chart and you will notice the snapshot controller pod errors out with image failed to pull.

Anything else we need to know?:
This bug only impacts helm chart.

Environment:

• CSI Driver version: 4.4.0
• Kubernetes version (use kubectl version): 1.24.0
• OS (e.g. from /etc/os-release): Ubuntu 20.04.5 LTS
• Kernel (e.g. uname -a): Linux minikube 5.15.90.1-microsoft-standard-WSL2
• Install tools:
• Others: