Separate generated file and protobuf dependency

Makefile

build.yaml

include/grpc++/impl/codegen/config_protobuf.h

src/cpp/ext/proto_server_reflection.h

test/cpp/end2end/async_end2end_test.cc

test/cpp/end2end/proto_server_reflection_test.cc

test/cpp/util/proto_reflection_descriptor_database.cc

test/cpp/util/proto_reflection_descriptor_database.h

tools/run_tests/sources_and_headers.json

...pc++_reflection_codegen/grpc++_reflection_codegen.vcxproj

...lection_codegen/grpc++_reflection_codegen.vcxproj.filters