Groupby Metrics

[GWphua]

Attempt at #18781 .

Description

Remove GroupByStatsProvider.PerQueryStats

• Implement groupby metrics reporting in GroupByQueryMetrics.
• Replace usages of GroupByStatsProvider.PerQueryStats with either QueryPlus or GroupByQueryMetrics.
• Update all method signatures in the codebase which rely on GroupByStatsProvider or PerQueryStats.
• Update GroupByStatsProvider Test.

TODOs

• Verify metrics emission through MetricsEmittingQueryRunner.
• Verify metrics emitted are the same as the previous GroupByStatsProvider#PerQueryStats.
• Come up with new metric names, current metrics names clash with GroupByStatsMonitor.

Release note

TODO.

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Key changed/added classes in this PR

TODO.

• MyFoo
• OurBar
• TheirBaz

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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.
• 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.