Idea: update test Pyramid for Continuous Delivery of Machine Learning based software systems

[ttimbers]

In https://martinfowler.com/articles/cd4ml.html, a very nice test Pyramid for Continuous Delivery of Machine Learning based software systems is presented (pasted below for convenience). This is cited and reprinted in Openja et al., (2023) where they identify that is incomplete. It would be great to take the new test strategies and types identified by Openja et al., (2023) (and potentially here in this work) and use that to improve the test pyramid for ML.