Merge pull request #6636 from yang-g/grpc_cli

Makefile

build.yaml

test/cpp/util/cli_call.cc

test/cpp/util/grpc_cli.cc

test/cpp/util/proto_file_parser.cc

test/cpp/util/proto_file_parser.h

tools/run_tests/sources_and_headers.json

vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj

...vcxproj/grpc++_test_util/grpc++_test_util.vcxproj.filters

vsprojects/vcxproj/grpc_cli_libs/grpc_cli_libs.vcxproj

...jects/vcxproj/grpc_cli_libs/grpc_cli_libs.vcxproj.filters

vsprojects/vcxproj/test/cli_call_test/cli_call_test.vcxproj

vsprojects/vcxproj/test/grpc_cli/grpc_cli.vcxproj