Add a test that measures flow control stalls in a deterministic way

CMakeLists.txt

Makefile

build.yaml

src/core/ext/transport/chttp2/transport/frame_settings.h

test/core/util/trickle_endpoint.c

test/core/util/trickle_endpoint.h

test/cpp/microbenchmarks/bm_fullstack.cc

tools/run_tests/generated/sources_and_headers.json

vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj

...cts/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters

...j/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj

...est_util_unsecure/grpc_test_util_unsecure.vcxproj.filters