Python: Add S3 Batch scenario with CloudFormation integration

[aBurmeseDev]

This PR adds code example that demonstrates how to use the AWS SDK for Python (boto3) to work with S3 Batch Operations. The scenario covers various operations such as creating an AWS Batch compute environment, creating a job queue, creating a job definition, and submitting a job.

The example includes:

• CloudFormation integration for IAM role creation
• S3 bucket and object management
• S3 Batch job creation and monitoring
• Comprehensive unit tests with mocking

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.