C# new .csproj projects

Avoid boxing of IntPtr in CompletionRegistry

Fix the max idle timer

Remove unnecessary C# dependency in Dockerfiles

Fix mac build

Alpine linux support

Cleanup of tsi ssl handshaker factories.

Updating roots from Mozilla.

Get tests to pass for c++

Ignore a couple of errors in the Node express benchmark

Support C++ (binary) error_details

Fix asan bug in bm_cq_multiple_threads

create a grpc client qps test logging reporter

There is no reason why the client and server factories should be
implementations from the same base.
Doing the cleanup now so that implementation of the #10528 feature will
be less noisy.
Also, re-added tsi to clang-format which was dropped when moved from
src/core/lib to src/core.

C++ build for python

Allow using gRPC as a cmake subproject

Print out some cli error message for getservices