Add integration_type to Tesla Fleet manifest (home-assistant#157679)

Author: Bre77

homeassistant/components/tesla_fleet/manifest.json

@@ -5,6 +5,7 @@
   "config_flow": true,
   "dependencies": ["application_credentials", "http"],
   "documentation": "https://www.home-assistant.io/integrations/tesla_fleet",
+  "integration_type": "hub",
   "iot_class": "cloud_polling",
   "loggers": ["tesla-fleet-api"],
   "requirements": ["tesla-fleet-api==1.2.5"]