New Check: AWS Lambda Functions with High Error Rates

[brittandeyoung]

Summary

Checks for Lambda functions with high error rates that might result in higher costs.

Motivation

Lambda charges are based on the number of requests and aggregate run time for your function. Function errors may cause retries that incur additional charges.

Additional context

https://docs.aws.amazon.com/awssupport/latest/user/cost-optimization-checks.html#aws-lambda-functions-with-high-error-rates