Add Datasketch aggregator integration test

[maytasm]

Add Datasketch aggregator integration test

Description

Adding more Datasketch aggregator to our integration tests.
Area adding:

• Datasketch aggregator on ingestion
• Datasketch aggregator on query

This PR has:

• been self-reviewed.
• added documentation for new or modified features or behaviors.
• added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links.
• added or updated version, license, or notice information in licenses.yaml
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths.
• added integration tests.
• been tested in a test Druid cluster.