Update /api/v4/cluster/status docs (#28189)

Co-authored-by: Mattermost Build <build@mattermost.com>

api/v4/source/cluster.yaml

@@ -4,8 +4,9 @@
         - cluster
       summary: Get cluster status
       description: >
-        Get a set of information for each node in the cluster, useful for
+        Get a list of all healthy nodes, including local information and
-        checking the status and health of each node.
+        status of each one. If a node is not present, it means it is not
+        healthy.
 
         ##### Permissions
 

api/v4/source/definitions.yaml

@@ -2205,29 +2205,29 @@ components:
         emails:
           type: string
     ClusterInfo:
-      type: object
+      type: array
       properties:
-        id:
+        items:
-          description: The unique ID for the node
+          type: object
-          type: string
+          properties:
-        version:
+            id:
-          description: The server version the node is on
+              description: The unique ID for the node
-          type: string
+              type: string
-        config_hash:
+            version:
-          description: The hash of the configuartion file the node is using
+              description: The server version the node is on
-          type: string
+              type: string
-        internode_url:
+            schema_version:
-          description: The URL used to communicate with those node from other nodes
+              description: The number of the latest DB migration successfully executed for the node
-          type: string
+              type: string
-        hostname:
+            config_hash:
-          description: The hostname for this node
+              description: The hash of the configuration file the node is using
-          type: string
+              type: string
-        last_ping:
+            ipaddress:
-          description: The time of the last ping to this node
+              description: The IP address of the node
-          type: integer
+              type: string
-        is_alive:
+            hostname:
-          description: Whether or not the node is alive and well
+              description: The hostname for this node
-          type: boolean
+              type: string
     AppError:
       type: object
       properties: