Investigate AWS Lambda Extensions API and use-cases

In October 2020 AWS has released [Lambda Extensions](https://aws.amazon.com/about-aws/whats-new/2020/10/aws-lambda-extensions-integrate-operational-tools/). 

The official Lambda Runtimes already support the new Extension API. We should investigate the support use cases and consider supporting the new [Extensions API](https://docs.aws.amazon.com/lambda/latest/dg/runtimes-extensions-api.html).