Implement GET /cluster/status endpoint for APIv4 (#5732)

i18n/en.json

@@ -71,6 +71,10 @@
     "id": "api.admin.file_read_error",
     "translation": "Error reading log file"
   },
+  {
+    "id": "api.cluster.init.debug",
+    "translation": "Initializing cluster API routes"
+  },
   {
     "id": "api.admin.get_brand_image.not_available.app_error",
     "translation": "Custom branding is not configured or supported on this server"