Improve perf_client to use AsyncRun with callback API  (#372)
Improve perf_client to use AsyncRun with callback API  (#372)

* Improve perf_client to use new AsyncRun API

* Unify AsyncInfer function for non-sequence model and sequence model

triton-inference-server/client,triton-inference-server/client,triton-inference-server/client,triton-inference-server/client,triton-inference-server/client,triton-inference-server/client,triton-inference-server/client