s3 deployment for Lambda is using Python 3.7

[vdantuluri-takeda]

As we know the s3deployment lambda function is deployed on python 3.7, and Python 3.7 runtime is not longer supported by AWS at the end of Nov 2023. How do we update the runtime as the default run time is 3.7 as per the documentation.

Development
The custom resource is implemented in Python 3.7 in order to be able to leverage the AWS CLI for "aws s3 sync". The code is under lib/lambda and unit tests are under test/lambda.

This package requires Python 3.7 during build time in order to create the custom resource Lambda bundle and test it. It also relies on a few bash scripts, so might be tricky to build on Windows.