Add AWS Lambda tutorial for ESIP summer meeting

[torimcd]

This is intended to go in the "In Development" section of the cookbook. aws_lambda_sst/podaac-lambda-invoke-sst-global-mean.ipynb is the main notebook for the documentation.

[review-notebook-app]

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[cassienickles]

Looks great, I'll add it into the in development section. As we move forward in the future moving it out of the in development section, would be good to follow the template for formatting the beginning (ie. adding your author name etc). The template should be in the notebooks folder for reference. We might be changing it a bit since we are switching to earthaccess and the users hopefully don't need to know as much about netrc's. Here's a good example notebook of the look we're going for: https://podaac.github.io/tutorials/notebooks/datasets/OPERA_GIS_Cloud.html