New Check: Amazon Redshift Reserved Node Optimization

[brittandeyoung]

Summary

Checks your usage of Amazon Redshift and provides recommendations on purchase of Reserved Nodes to help reduce costs incurred from using Amazon Redshift On-Demand.

Motivation

Reserved Nodes help reduce cost.

Additional context

https://docs.aws.amazon.com/awssupport/latest/user/cost-optimization-checks.html#amazon-redshift-reserved-node-optimization