[admin-tool][controller] Add new config into ZK and allow admin-tool to update the config #1418
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Summary
Add admin operation version into ZK as a config and allow admin-tool to update the version.
We will introduce a new field in adminTopicMetadata in ZK at clsuter-level to store the admin operation version to serialize/deserialize the message.
How was this PR tested?
current integration tests
What's next?
Update the serializer to fetch the version in ZK before serialize the message, and pass over this version for deserializer to deserialize.
Does this PR introduce any user-facing changes?