(aws-eks) EKS Add-On support as L2/3 construct

### Describe the feature

As of 2022-03-01 we have the possibility to install the EBS CSI Driver via eksctl and management console.

I couldn't find a way to do this via aws-eks CDK module.

References:

- https://aws.amazon.com/about-aws/whats-new/2022/03/eks-add-ons-ebs-csi-driver-available/
- https://docs.aws.amazon.com/eks/latest/userguide/managing-ebs-csi.html
- https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_eks-readme.html#table-of-contents

### Use Case

I'm using the instructions at this link [1] to install EBS CSI Driver using helm inside CDK, but it could be simpler to use an add-on via CDK.

1. https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_eks-readme.html#table-of-contents

### Proposed Solution

_No response_

### Other Information

_No response_

### Acknowledgements

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### CDK version used

2.19.0

### Environment details (OS name and version, etc.)

Ubuntu 20.04

Start with the aws-eks CDK module and the AWS EKS add-on documentation linked in the issue, then compare the existing Helm-based instructions in the CDK README. Done means the scope and validation behavior for exposing the EBS CSI Driver as an EKS add-on through a documented L2/L3 construct are settled.

Written by the indexing model from the issue text.