Replace the tool of code generator for the gRPC API

[tenzen-y]

/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.

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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[tenzen-y]

cc: @andreyvelich @johnugeorge

[tenzen-y]

Maybe, we can migrate the tool to the Buf.

[johnugeorge]

Agree. We should try it out

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[andreyvelich]

/lifecycle frozen

[andreyvelich]

/good-first-issue

[google-oss-prow]

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