DynamoDB enhanced client DynamoDbIndex.query to return PageIterable

### Describe the feature

When using enhanced DynamoDB there is an interface for PageIterable that adds useful functionality on top of SDKIterable.java, namely an iterator across all pages from the result set. The [query method](https://github.com/aws/aws-sdk-java-v2/blob/8f54393ff4e166eb3f56bc1b411b27f6bf0213b5/services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/internal/client/DefaultDynamoDbIndex.java#L57) of DynamoDBTable.java returns said useful type, however similar class DynamoDBIndex.java returns the more basic SDKIterable.java in the [query method](https://github.com/aws/aws-sdk-java-v2/blob/8f54393ff4e166eb3f56bc1b411b27f6bf0213b5/services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/internal/client/DefaultDynamoDbTable.java#L177).

This was already raised in https://github.com/aws/aws-sdk-java-v2/issues/2185, but I believe the documentation fix is not the ideal long term solution. The solution would be to provide similar support for query() both in DynamoDBTable and DynamoDBIndex.

When using dynamo console in the browser, the query works the same for the default table index and the created GSIs, the code should behave consistently.

### Is your Feature Request related to a problem?

This requires all consumers of SDK to do extra coding for replicating code that the SDK already distributes. This increases code duplication as is error prone, both issues that PageIterable interface solves in the first place.

### Proposed Solution

Proposal for non-breaking change,
- Keep the existing DynamoDBIndex ```SdkIterable> query(QueryEnhancedRequest request);```
- Add a new method in DynamoDBIndex ```PageIterable query(QueryEnhancedRequest request);```

### Describe alternatives you've considered

_No response_

### Acknowledge

- [ ] I may be able to implement this feature request

### AWS Java SDK version used

2.17.76

### JDK version used

openjdk 11.0.12

### Operating System and version

MacOS 12.0.1

Inizia con le dichiarazioni delle query di DynamoDBIndex e DynamoDBTable, quindi confronta DefaultDynamoDbIndex.java con DefaultDynamoDbTable.java, in particolare le implementazioni delle query collegate. Traccia come viene restituito PageIterable per le query sulle tabelle e determina il comportamento corrispondente dell’indice; il lavoro è completato quando le query sugli indici forniscono lo stesso supporto per l’iterazione delle pagine, preservando al contempo i requisiti di compatibilità proposti.

Scritto dal modello di indicizzazione a partire dal testo della issue.