Benchmarking for RPCChainVM Latency

[aaronbuchwald]

Provide a generic benchmarking tool that will take any gRPC service and benchmark the latency that comes from serving it over gRPC.

This means each test will:

• provide mocked data responses to serve over gRPC
• benchmark will run with the mocked responses
• generate a benchmark of the latency serving it over gRPC
• Run a profiler for memory and CPU of serving the data over gRPC

[StephenButtolph]

closed by #1326