Add AWS Cost Explorer forecast automation#1200

NithinChandranR-AWS wants to merge 3 commits intoaws-solutions-library-samples:mainaws-solutions-library-samples/cloud-intelligence-dashboards-framework:mainfrom

NithinChandranR-AWS:feature/cost-forecast-automationNithinChandranR-AWS/aws-cudos-framework-deployment:feature/cost-forecast-automationCopy head branch name to clipboard