feat(cwp-template-aws): add storage operations

[brunozoric]

Changes

Add a possibility to choose from different storage operations for the cwp-template-aws package.
Template folder contains:

• dynamodb (ddb) - files that are specific for the dynamodb storage operations
• dynamodb + elasticsearch (ddb-es) - files that are specific for the dynamodb + elasticsearch storage operations
• common - files that are common to both dynamodb and dynamodb + elasticsearch storage operations

This is the initial idea. We will see if there is another, better, way to handle multiple storage operation templates over multiple cloud providers.

How Has This Been Tested?

Manual testing: publish to verdaccio and try create-webiny-project.