Attempt to fix sanity tests

Revert "Revive C++ large-message throughput tests"

Better guesses at benchmarks turned unit tests cpu cost

Fix some ubsan issues

"taking a this" -> "taking this" typo correction

Refactoring the core security code.

Revive C++ large-message throughput tests

Fix to undefined reference to gpr_log

One more typo fix

Small run_full_performance.sh fixups

Fixes leak in test_cancel_after_client_done & cancel_after_accept

Introduce run_full_performance.sh and support 32core scenarios

Simplify profiling in C# qps clients.

C# assorted cleanup

Fix code coverage.

Add very much needed documentation for tools/run_tests/ directory