feature: Support of ReturnConsumedCapacity in DynamoDBEnhancedClient's TransactWriteItem operation

[prateek-vats]

Motivation and Context

Currently the response returned by a TransctWriteItem operations don't return the Capacity consumed unlike some other requests. This PR introduces that feature
Open issue: #4123

Modifications

Make TransctWriteItems operation return TransctWriteEnhancedItemResponse which will contain ConsumedCapacity and ItemCollectionMetrics
Added support for returnCapacityConsumed to the TransctWriteEnhancedItemRequest

Testing

Added unit tests and functional tests

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING document
• Local run of mvn install succeeds
• My code follows the code style of this project
• My change requires a change to the Javadoc documentation
• I have updated the Javadoc documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed
• I have added a changelog entry. Adding a new entry must be accomplished by running the scripts/new-change script and following the instructions. Commit the new file created by the script in .changes/next-release with your changes.
• My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• I confirm that this pull request can be released under the Apache 2 license