Merge branch 'master' into server_channel_affinity

Makefile

build.yaml

src/core/ext/client_config/subchannel_call_holder.c

src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs

src/csharp/Grpc.Core/Internal/AsyncCall.cs

src/csharp/Grpc.Core/Internal/AsyncCallBase.cs

src/csharp/Grpc.IntegrationTesting/InteropClient.cs

templates/Makefile.template

test/build/extra-semi.c

test/build/no-shift-negative-value.c

test/core/client_config/lb_policies_test.c

test/core/end2end/fixtures/h2_ssl_cert.c

test/cpp/interop/client.cc

test/cpp/interop/interop_client.cc

test/cpp/interop/interop_client.h

test/cpp/interop/stress_interop_client.cc

test/cpp/interop/stress_interop_client.h

test/cpp/interop/stress_test.cc

tools/dockerfile/grpc_clang_format/Dockerfile

tools/gce/create_linux_performance_worker.sh