LADM: Migrate core infrastructure

Move the core infrastructure required for this workshop, please consider the existing stacks that are deployed such as [The zETL with OS](https://github.com/aws-samples/amazon-dynamodb-labs/tree/master/static/files/dynamodb-opensearch-zetl), this could save you extra hours of work.

Start by reviewing the existing stack at static/files/dynamodb-opensearch-zetl and the workshop's current infrastructure references. Identify which core infrastructure must be migrated and define the target stack boundaries before changing anything. Done means the workshop's required infrastructure is migrated and the relevant deployment path works end to end.

Written by the indexing model from the issue text.