Merge pull request #9756 from ncteisen/to-grpc-err-is-human

CMakeLists.txt

Makefile

build.yaml

grpc.def

include/grpc/support/sync.h

src/core/lib/iomgr/error.c

src/core/lib/support/sync.c

src/ruby/ext/grpc/rb_grpc_imports.generated.c

src/ruby/ext/grpc/rb_grpc_imports.generated.h

test/core/iomgr/error_test.c

test/cpp/microbenchmarks/bm_error.cc

tools/run_tests/generated/sources_and_headers.json

tools/run_tests/generated/tests.json

vsprojects/buildtests_c.sln

vsprojects/vcxproj/test/error_test/error_test.vcxproj

...ojects/vcxproj/test/error_test/error_test.vcxproj.filters