In _server.py start_server_batch_result is removed because
start_server_batch can only ever fail as a result of a programming
defect in gRPC Python and not the application. This differs from some
analogous-appearing points in _channel.py where the result of
start_client_batch is checked because at those points it is possible
for a failure to indicate a programming defect on the part of the
application.

add gflags to bazel

Fix flakiness in testPacketCoalescing

Increase test timeout duration for internal CI

Splitted grpc_interop test setup for Kokoro into multiple jobs and skipped *_to_prod tests.

Add microbenchmark of single-threaded CQ operations

Contain the links for the pending handshake managers inside handshake…

Fix typo

Remove internal api canaries: they have never solved anything for us

Add counters for rmw atomic operations to microbenchmarks

Fix class name on documentation

Remove dead code

Temporarily disable lb policies test

C++ default health checking service.

Speed up latency profiling (and tune down the memory usage)