add benchmark for optical flow Raft model

[WanliZhong]

No description provided.

[WanliZhong]

Fail on CANN backend.

[ WARN:[email protected]] global net_cann.cpp:120 initBackend DNN/CANN: layer (name=onnx_node!InstanceNormalization_16/MVN, type=MVN) is not supported by CANN backend. Going back to default backend on CPU target

[fengyuentau]

Fail on CANN backend.

[ WARN:[email protected]] global net_cann.cpp:120 initBackend DNN/CANN: layer (name=onnx_node!InstanceNormalization_16/MVN, type=MVN) is not supported by CANN backend. Going back to default backend on CPU target

It should not go to MVN. We have dedicated instance norm layer already.

[WanliZhong]

Fail on CUDA and CUDA-FP16 target.

terminate called without an active exception

[WanliZhong]

Benchmark is already done. Raft run very very slow. I set 30s as the accepted time for the color table.

[fengyuentau]

Thanks for the hard work. I propose not to put this model into the benchmark table. Lets discuss in the meeting.