TODO:Argo workflow on SQLFlow

[Yancey0623]

• gRPC interface
  • Server
    • Update server sqlflowserver.proto to add Run and Fetch interface Update sqlflow.proto to support async submit SQLFlow job #1198
    • gRPC Fetch interface invoke argo.Fetch to fetch logs and status. gRPC fetch interface invoke the argo.Fetch  #1525
  • pysqlflow
    • Implement Run and Fetch.
• Couler
  • Design: Couler step function: Design: Couler step function in SQLFlow #1208
  • sqlflowserver calls codegen_couler.go to generate Couler program. implement couler codegen #1268
• Argo
  • submit Argo workflow
    • kubectl command-line to submite the Argo YAML. Submit Argo workflow #1252
    • Add e2e test for Couler and Argo. Add couler e2e test #1245
    • codegen_couler.go generates Argo yaml with speicify cluster configuration file. add couler cluster config #1379
  • fetch worfklow status Reuse Argo workflow status phase #1375
  • fetch workflow steps logs
    • fetch one step logs
    • fetch multiple steps logs Fetch container logs by a workflow job name #1367
    • fetch logs in a incremental way [workflow] kubectl fetch logs from the step Pod in a polling manner #1382
    • fetch running workflow fetch running workflow #1459
• Argo
  • Doc: Submit Argo workflow: [Doc] Submit Argo Workflow from SQLFlow Container #1079
  • Setup Argo testing environment in CI: Setup Argo test environment in CI #1219
• Parser
  • sqlflowserver calls third-party Parser to parse/split the SQL program.
• SQLFlow command line
  • sqlflow -parse to generate IR as a Protocol Buffer text file