Disable c-ares on windows

include/grpc/impl/codegen/port_platform.h

src/core/ext/resolver/dns/c_ares/dns_resolver.c

src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver.h

src/core/ext/resolver/dns/c_ares/grpc_ares_ev_driver_posix.c

src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.c

src/core/ext/resolver/dns/c_ares/grpc_ares_wrapper.h

test/core/end2end/fuzzers/api_fuzzer.c

tools/run_tests/sources_and_headers.json

vsprojects/vcxproj/ares/ares.vcxproj

vsprojects/vcxproj/ares/ares.vcxproj.filters