Add new metrics from v30 to prometheus-emitter

[ztzxt]

Description

Added new metrics for prometheus emitter

This PR has:

• been self-reviewed.
• added documentation for new or modified features or behaviors.
• a release note entry in the PR description.
• 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.

[ztzxt]

Newly introduced metrics in druid release v30 are added per @cryptoe's comment #16340 (comment)

[cryptoe]

Thank you @ztzxt for the contribution.

[cryptoe]

@ztzxt Could you please rebase this patch on top of the latest master. Post that CI will run

[ztzxt]

hi @cryptoe I just saw your comment. it should be good to go now