More than one query can be visualized together in a single plot

[Schaechtle]

In .adoc files, we want to visualize and compare different queries in the same plot; for example, to compare:

• SELECT vs GENERATE
• SELECT vs GENERATE UNDER baseline_model vs GENERATE UNDER linear_model
• GENERATE UNDER baseline_model vs GENERATE UNDER baseline_model GIVEN foo="baz"

This entails the creation of multiple plots with heterogeneously typed data stemming from the different queries and coloring accordingly, similar to what we show already in our QC dashboard (see screenshot below).