Mark assist_pipeline as a system integration type (#123202)

homeassistant/components/assist_pipeline/manifest.json

@@ -4,6 +4,7 @@
   "codeowners": ["@balloob", "@synesthesiam"],
   "dependencies": ["conversation", "stt", "tts", "wake_word"],
   "documentation": "https://www.home-assistant.io/integrations/assist_pipeline",
+  "integration_type": "system",
   "iot_class": "local_push",
   "quality_scale": "internal",
   "requirements": ["pymicro-vad==1.0.1"]

homeassistant/generated/integrations.json

@@ -490,12 +490,6 @@
       "config_flow": true,
       "iot_class": "cloud_polling"
     },
-    "assist_pipeline": {
-      "name": "Assist pipeline",
-      "integration_type": "hub",
-      "config_flow": false,
-      "iot_class": "local_push"
-    },
     "asterisk": {
       "name": "Asterisk",
       "integrations": {