Grafana dashboard missing per runner nexmark pages

The perfkit dashboard was just turned down, it had a page comparing different implementations for the same query for each runner (Dataflow, Direct, ect). For example, this would be "Java Batch vs Java Streaming vs SQL vs ZetaSQL on Dataflow".

The new grafina dashboard breaks down nexmark per implementation (Java, SQL, missing ZetaSQL), and hides streaming which isn't a useful comparison as different runners have different sample sizes and measurement techniques.