[doc] add tutorial for cluster utils (#3763)

* [doc] add en cluster utils doc

* [doc] add zh cluster utils doc

* [doc] add cluster utils doc in sidebar

docs/sidebars.json

@@ -58,7 +58,8 @@
           ]
         },
         "features/pipeline_parallel",
-        "features/nvme_offload"
+        "features/nvme_offload",
+        "features/cluster_utils"
       ]
     },
     {

docs/source/en/features/cluster_utils.md

+# Cluster Utilities
+
+Author: [Hongxin Liu](https://github.com/ver217)
+
+**Prerequisite:**
+- [Distributed Training](../concepts/distributed_training.md)
+
+## Introduction
+
+We provide a utility class `colossalai.cluster.DistCoordinator` to coordinate distributed training. It's useful to get various information about the cluster, such as the number of nodes, the number of processes per node, etc.
+
+## API Reference
+
+{{ autodoc:colossalai.cluster.DistCoordinator }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.is_master }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.is_node_master }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.is_last_process }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.print_on_master }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.print_on_node_master }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.priority_execution }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.destroy }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.block_all }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.on_master_only }}

docs/source/zh-Hans/features/cluster_utils.md

+# 集群实用程序
+
+作者: [Hongxin Liu](https://github.com/ver217)
+
+**前置教程:**
+- [分布式训练](../concepts/distributed_training.md)
+
+## 引言
+
+我们提供了一个实用程序类 `colossalai.cluster.DistCoordinator` 来协调分布式训练。它对于获取有关集群的各种信息很有用，例如节点数、每个节点的进程数等。
+
+## API 参考
+
+{{ autodoc:colossalai.cluster.DistCoordinator }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.is_master }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.is_node_master }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.is_last_process }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.print_on_master }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.print_on_node_master }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.priority_execution }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.destroy }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.block_all }}
+
+{{ autodoc:colossalai.cluster.DistCoordinator.on_master_only }}