DynamoDbEnhancedClient: Add `StreamSpecification` to `CreateTableEnhancedRequest`

[acouvreur]

Type: Feature

Is your feature request related to a problem? Please describe. Right now when using table.createTable we cannot specify any StreamSpecification.

This means that you must create the schema using CreateTableRequest instead.

Describe the solution you'd like The CreateTableEnhancedRequest should provide a streamSpecification method to allow the user to specify a StreamSpecification to generate the table schema.

Describe alternatives you've considered Using CreateTableRequest instead. But I'm not sure what I should create to have the same behavior as the DynamoDbTable.createTable method.

[maciejwalkowiak]

Blocked by https://github.com/aws/aws-sdk-java-v2/pull/4011