CMake should run actorFuzz.py to generate ActorFuzz.actor.cpp

Currently, comments in `ActorFuzz.actor.cpp` indicate that it is meant to be generated by `actorFuzz.py` and not manually edited. However, the file is under version control and is not regularly updated. CMake can regenerate this file whenever changes are made to the actor compiler, and we can then remove `ActorFuzz.actor.cpp` from the git repository.

Start by locating the CMake configuration that builds ActorFuzz.actor.cpp and the actorFuzz.py generator. Check how generated sources are currently tracked and how actor compiler changes trigger builds. Done means CMake regenerates the file reliably and ActorFuzz.actor.cpp is removed from version control.

Written by the indexing model from the issue text.