[EKS] [aws-efs-csi-driver]: support for pod labels

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**Tell us about your request**
I would like to configure pod labels on `aws-efs-csi-driver` EKS add-on configuration

**Which service(s) is this request for?**
EKS

**Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard?**
Pod labels are not supported for the `aws-efs-csi-driver` addon. They are supported for other addons with `podLabels` or `customLabels` configuration options.

**Are you currently working around this issue?**
No

**Additional context**
Pod labels are supported through the helm chart.
[controller.podLabels](https://github.com/kubernetes-sigs/aws-ebs-csi-driver/blob/d5dd8cf0145af3bf3962f1ceb54c8f96a5503016/charts/aws-ebs-csi-driver/values.yaml#L243)
[node.podLabels](https://github.com/kubernetes-sigs/aws-ebs-csi-driver/blob/d5dd8cf0145af3bf3962f1ceb54c8f96a5503016/charts/aws-ebs-csi-driver/values.yaml#L360C3-L360C12)

Start by comparing the requested EKS add-on configuration with the linked aws-ebs-csi-driver Helm chart values for controller.podLabels and node.podLabels. Determine where aws-efs-csi-driver add-on configuration is defined; done means pod labels can be configured for the add-on and the behavior is documented or tested there.

Written by the indexing model from the issue text.