fix(model): move name and version out of updated model info message struct

[Phelan164]

Because

• Model name and version is not allowed to update

This commit

• Move model name and version out of updated model info message struct

[bochengyang]

@Phelan164 I would like to suggest another way of the design of protobuf like this

rpc UpdatePipeline (UpdatePipelineRequest) returns (PipelineInfo) {
  option (google.api.http) = {
    patch: "/pipelines/{pipeline.name}"
    body: "pipeline"
  };
}

[Phelan164]

@bochengyang I agree that we could use ModelInfo for updating. But there is some fields in ModelInfo do not allow to be updated. So I create an other message struct for updating model info.

[bochengyang]

LGTM 🚀

[Phelan164]

@bochengyang I got your point. It is elegant way. I updated following that