EKS: Container Insights for mixed OS EKS Clusters

**Tell us about your request**
Modify Container Insights to allow for usage with mixed os EKS clusters, providing metrics for autoscaling of windows HPA resources.

**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?**
What outcome are you trying to achieve, ultimately, and why is it hard/impossible to do right now? What is the impact of not having this problem solved? The more details you can provide, the better we'll be able to understand and solve the problem.
Mixed OS EKS Clusters currently have no options to provide metrics for Windows based HPA resources. Gathering these insights from CloudWatch would be extremely beneficial.

**Are you currently working around this issue?**
Investigating lambda usage

**Additional context**
Anything else we should know?

**Attachments**
If you think you might have additional information that you'd like to include via an attachment, please do - we'll take a look. (Remember to remove any personally-identifiable information.)

No repository files, tests, or entry points are mentioned. Start by reviewing the EKS Container Insights and CloudWatch context described here, then define the required metrics for Windows HPA resources in mixed-OS clusters; done means those metrics are available for autoscaling.

Written by the indexing model from the issue text.