Emit vectorized metric dimension by default

[rohangarg]

Vectorized metric will help in knowing more information about the performance profile of a workload

This PR has:

• been self-reviewed.
  • using the concurrency checklist (Remove this item if the PR doesn't have any relation to concurrency.)
• 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, ensuring the threshold for code coverage is met.
• added integration tests.
• been tested in a test Druid cluster.

[suneet-s]

nice! This will be helpful in bringing more visibility into what types of queries could benefit from being optimized 👍

[suneet-s]

Marked as release notes as users may want to know about this new dimension. The release manager should feel free to choose to exclude this from the release notes if they decide it isn't necessary.