Remove deprecated DAG flags from built-in evaluators in the evals
pacakge, replacing them with flex flows. Functionality this amounts to
directly coding the behavior specified in former flow.dag.yaml files.
This ended up editing 2 evaluators: F1 score and content safety. In the
case of content safety, I used this change to refactor the code slightly
into a base class and children, which mostly still exist just to have
their own docstrings.
MilesHolland
7362dc1c78