feat: support horaedb submit compaction task to remote

[LeslieKid]

Rationale

The subtask to support compaction offloading. See #1545

Detailed Changes

Compaction node support remote compaction service

• Define CompactionServiceImpl to support compaction rpc service.

• Introduce NodeType to distinguish compaction node and horaedb node. Enable the deployment of compaction node.

• Impl compaction_client for horaedb node to access remote compaction node.

Horaedb node support compaction offload

• Introduce compaction_mode in analytic engine's Config to determine whether exec compaction offload or not.
• Define CompactionNodePicker trait, supporting get remote compaction node info.
• Impl RemoteCompactionRunner, supporting pick remote node and pass compaction task to the node.
• Add docs (e.g. example-cluster-n.toml) to explain how to deploy a cluster supporting compaction offload.

Test Plan

[Rachelint]

It looks good to me.
I just helped to sort out codes, mainly move the compaction client to runner crate.

I am checking it in my local, let's merge it after the double check!

[LeslieKid]

I am checking it in my local, let's merge it after the double check!

I check your commits in my local.
It's indeed better to move compaction client to runner crate.

I think we can merge it.

[Rachelint]

LGTM

[Rachelint]

Thanks @LeslieKid