Don't apply compiler warnings and run clang-tidy on protobuf generated files.
Don't apply compiler warnings and run clang-tidy on protobuf generated files.

lightstep/lightstep-tracer-cpp,lightstep/lightstep-tracer-cpp,lightstep/lightstep-tracer-cpp,lightstep/lightstep-tracer-cpp,lightstep/lightstep-tracer-cpp