[Feature] eksctl to export the resources it created in a json

[dnyanesh-github]

What feature/behavior/change do you want?

Why do you want this feature?

[github-actions]

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[dnyanesh-github]

If "eksctl" creates a json of the resources it created, then those can be leveraged for the subsequent pipeline stages for automation. For example, I wanted to filter out the private subnets eksctl created in the VPC, I had to explicitely search for them and write additional code to filter them out, however, if only I had the json, I could just use them right away. This information is so very cruicial for non EKS services like RDS or Elasticache deployment, because you want them deployed in your VPC with a subnet group created on a private subnet.