Improve the presentation of examples test results.

[pgavlin]

We have a large matrix of tests that we run in this repository. It would be helpful to have a concise visual summarization of the results for the current and historical results of each test under each configuration. Such a representation could aid us in understanding the relative reliability of particular tests, overall reliability of the testbed, and more.

[leezen]

For M52, let's focus on just the design aspect of this and scope this issue out.