Enable metrics for csi-driver-registrar

[hichem-belhocine]

Is your feature request related to a problem?/Why is this needed
I need to scrap the csi-driver-registrar (efs-csi-node daemonset) metrics but the current csi-driver-regirstrar container is not configured to allow scraping metrics.

/feature

Describe the solution you'd like in detail
I would like to be able to do the same thing as here feat: enable metrics for csi-provisioner #1378

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/lifecycle stale

[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

• Mark this issue as fresh with /remove-lifecycle rotten
• Close this issue with /close
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/lifecycle rotten

[mkilchhofer]

/remove-lifecycle rotten

[mkilchhofer]

/cc @blanchardma