text: Title: Replace the tool of code generator for the gRPC API
  Body: /kind feature
  
  **Describe the solution you'd like**
  [A clear and concise description of what you want to happen.]
  Currently, we are generating codes for the gRPC API from the protocol buffers definition with [`znly/protoc`](https://hub.docker.com/r/znly/protoc/).
  
  However, the image doesn't seem to be maintained since the latest image was published 4 years ago.
  
  So, we should replace the toll with another one.
  
  follow-up: #2140 
  
  **Anything else you would like to add:**
  [Miscellaneous information that will assist in solving the issue.]
  
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