[EKS] [request]: Add EKS ArgoCD capability Application metrics to CloudWatch

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**Tell us about your request**
Add EKS ArgoCD capability Application metrics to CloudWatch

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

EKS ArgoCD capability has a dashboard showing the health/status of the Applications which are deployed.

It would be good if these metrics are available in CloudWatch so they can be exported to an external monitoring/alerting system

**Are you currently working around this issue?**
It would be possible to run a custom metrics collector against the Applications in the cluster but I feel it would be a better solution for the actual ArgoCD instance metrics to be made consumable from AWS

No repository files, tests, or entry points are identified in the issue. Start by locating the EKS ArgoCD capability and its existing Application health/status dashboard, then determine how those metrics could be exposed through CloudWatch. Done means Application metrics are available in CloudWatch for export to external monitoring or alerting systems.

Written by the indexing model from the issue text.