private TCreateDataRegionReq genCreateDataRegionReq(
      String storageGroup, TRegionReplicaSet regionReplicaSet) {
    TCreateDataRegionReq req = new TCreateDataRegionReq();
    req.setStorageGroup(storageGroup);
    req.setRegionReplicaSet(regionReplicaSet);
    return req;
  }
Do region creations and broadcast the {@link CreateRegionGroupsPlan}.

@return Those RegionReplicas that failed to create
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/env/ConfigNodeProcedureEnv.java