kv,server: extract Cluster service and register with DRPC server
#148451
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kv,server: extract `Cluster` service and register with DRPC serverThis is a follow-up to #145195, where we extracted
KVBatchfrom theInternalservice. Here, we do the same withCluster. The TL;DRis that smaller services are easier to maintain and can be more smoothly
migrated to DRPC.
We also enable this service on the DRPC server. This is controlled by
rpc.experimental_drpc.enabled(off by default).This change is part of a series and is similar to: #146926
Note: This only registers the service; the client is not updated to use the
DRPC client, so this service will not have any functional effect.
server: replace `RPCClusterClient` for cluster join operationThis change replaces the direct client creation through
NewInternalClientwith the gRPC adapter. See #147950 for more context. Also, since we have a
more targeted service for
JoinRPC, we should use its adapter interface.Release note: none
Epic: CRDB-48923