Adopt Kubernetes recommended labels

[thetric]

This project does not use Kubernetes recommended labels, e.g. app instead of app.kubernetes.io/name.

• https://github.com/kubernetes-csi/external-snapshotter/blob/master/deploy/kubernetes/snapshot-controller/setup-snapshot-controller.yaml#L31
• https://github.com/kubernetes-csi/external-snapshotter/blob/master/deploy/kubernetes/csi-snapshotter/setup-csi-snapshotter.yaml#L70

What happened:

Installed the snapshot-controller.

What you expected to happen:

The components consistently use the the recommended labels.

How to reproduce it:

Deploy the snapshot-controller or csi-snapshotter

Anything else we need to know?:

n/a

Environment:

• Driver version: 6.2.1
• Kubernetes version (use kubectl version): 1.27
• OS (e.g. from /etc/os-release): Amazon Linux 2
• Kernel (e.g. uname -a): 5.10
• Install tools:
• Others:

[mowangdk]

/assign