Allow adding shape, color and size to plotting of benchmarks

[ngupta23]

Current

• X axis = Time
• Y axis = Primary Metric

Future

In addition to the current, add the following

• Color = model
• Shape = type (e.g. internal or external benchmark)
• Size = secondary metric

[ngupta23]

Plotly color map has more shapes than colors. Hence started with assigning shapes to models, but this is hard to visualize for humans, especially with so many models on the plot. Hence, decided to mix colors and shapes for models itself. This is much more pleasing for the eye.

Also, if secondary metrics need to be plotted, it can be done as a different plot.