[Feature] Support JRaft service registration when automatic scaling up and down

[Pil0tXia]

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Feature Request

In the current implementation of JRaft meta plugin, if a new node is added to the cluster, users need to add the new node to the eventmesh.properties of the existing nodes before it can be added to the cluster.

Hopefully you can implement CliService in a sebsequent PR to support service registration when automatic scaling up and down of the cluster. Because the complete list of online nodes of the cluster cannot be maintained in real time.

After it's implemented, the newly added node can connect to any online node in the cluster. If connected to a follower, the current leader will be returned to new node by the follower.

Are you willing to submit PR?

• [ ] Yes I am willing to submit a PR!

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