New pattern: eventbridge-schedule-secret-rotation-cdk

[senthilkumarmohan]

Issue #2470

Description of changes:

This sample project demonstrates rotating secrets using AWS Amazon EventBridge Scheduler and AWS Lambda at desired intervals. An EventBridge schedule is created based on the 'Secret rotation schedule' CDK parameter with rotation lambda as the target. You could provide the interval at which you want the secret to be rotated as a cron or rate expression.

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