[aws-eks] Container Insights support for EKS

Quick Start Setup for Container Insights on Amazon EKS
https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Container-Insights-setup-EKS-quickstart.html

### Use Case

To enable the [container insights](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/ContainerInsights.html) support in AWS CDK for EKS cluster.

### Proposed Solution

Similar to Amazon ECS, we can offer`containerInsights` property for the Amazon EKS `Cluster` resource.

https://github.com/aws/aws-cdk/blob/7a10f0f9b9e8e4c9816a4f28335cca77a915b15f/packages/%40aws-cdk/aws-ecs/lib/cluster.ts#L49

### Other

* [x] :wave: I may be able to implement this feature request
* [ ] :warning: This feature might incur a breaking change

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This is a :rocket: Feature Request

Start by reviewing the Amazon ECS reference at packages/@aws-cdk/aws-ecs/lib/cluster.ts and the AWS Container Insights EKS quick-start documentation linked in the issue. Trace the EKS Cluster resource implementation and its tests or documentation. Done means the EKS Cluster offers containerInsights support consistent with the proposed behavior and the relevant validation is covered.

Written by the indexing model from the issue text.