Merge pull request #1558 from soltanmm/extension

src/python/src/grpc/_adapter/_c.c

src/python/src/grpc/_adapter/_c/module.c

src/python/src/grpc/_adapter/_c/types.c

src/python/src/grpc/_adapter/_c/types.h

src/python/src/grpc/_adapter/_c/types/call.c

src/python/src/grpc/_adapter/_c/types/channel.c

src/python/src/grpc/_adapter/_c/types/client_credentials.c

src/python/src/grpc/_adapter/_c/types/completion_queue.c

src/python/src/grpc/_adapter/_c/types/server.c

src/python/src/grpc/_adapter/_c/types/server_credentials.c

src/python/src/grpc/_adapter/_c/utility.c

src/python/src/grpc/_adapter/_c_test.py

src/python/src/grpc/_adapter/_call.c

src/python/src/grpc/_adapter/_call.h

src/python/src/grpc/_adapter/_channel.c

src/python/src/grpc/_adapter/_channel.h

src/python/src/grpc/_adapter/_client_credentials.c

src/python/src/grpc/_adapter/_client_credentials.h

src/python/src/grpc/_adapter/_completion_queue.c

src/python/src/grpc/_adapter/_datatypes.py