Activate Enhanced Metrics on Datadog Forwarder Lambda function

[baptiste-arnou-aircall]

Hi everyone.

First of all, thanks for your amazing work. Datadog is a powerful tool, and I'm amazed about the different features your teams are delivering.

Describe what happened:
I would like to see the memory used by the datadog forwarder function, but I'm not able to active enhanced_metrics on this function.
It's created by the cloudformation template you're providing here: https://datadog-cloudformation-template.s3.amazonaws.com/aws/forwarder/3.92.0.yaml

In this template, the environment variable used to activate enhanced_metrics is having false as a default value.

Describe what you expected:
I'm expected to be able to activate enhanced_metrics on this function.

Steps to reproduce the issue:
Install the forwarder using the cloudformation template, and check on datadog if you're able to see enhanced_metrics for this lambda.