New Check: AWS Lambda Functions with Excessive Timeouts

[brittandeyoung]

Summary

Checks for Lambda functions with high timeout rates that might result in high cost.

Motivation

Lambda charges based on run time and number of requests for your function. Function timeouts result in errors that may cause retries. Retrying functions will incur additionally request and run time charges.

Additional context

https://docs.aws.amazon.com/awssupport/latest/user/cost-optimization-checks.html#aws-lambda-functions-excessive-timeouts