feat: Add example for S3 bucket access through VPC Endpoint

[luigidifraiawork]

Description

Added an example that shows how to allow a Lambda Function to write objects to an S3 bucket without Internet access, using an S3 Gateway Endpoint available within the VPC the Function is attached to.

Motivation and Context

Provide the community with a working example of the above-mentioned scenario.

Breaking Changes

Not aware of any.

How Has This Been Tested?

• [X] I have updated at least one of the examples/* to demonstrate and validate my change(s)
• [X] I have tested and validated these changes using one or more of the provided examples/* projects

• [X] I have executed pre-commit run -a on my pull request