MLFlow's Abstract Wrapper Around the Transformers Flavors

ML flow doesn't have any other flavors that support input of strings. We knew that we needed to think about how do we pass a string in or a list of strings? What are all the different input types that we might have to think about in order to support this abstract wrapper around the transformers flavors? So knowing that we have an idea of what we don't know answers to in that first four hours of the design review that we're getting into, I just looked at their APIs and did a really quick test of it.