Right now, running the fuzzer in fuzzing mode is pretty noisy due to this output; it makes it hard to see the fuzzer's own progress output. It's also not really needed: users can run explorer on inputs more directly, without using this tool (albeit with fuzzverter), if they want to see detailed results.
This does some more work to the run_clang_tidy.py wrapper script, and runs an example pass.
"again" because it's really the proto fuzzer changes that broke it, it had been working before.
"mostly" because there's still an issue within the proto fuzzer that it can't find "port/protobuf.h", i.e. https://github.com/google/libprotobuf-mutator/tree/master/port, but I'm still hesitant to add an include path there.