Allow hassfest to validate specific integrations (#34277)

script/hassfest/zeroconf.py

@@ -120,6 +120,9 @@ def validate(integrations: Dict[str, Integration], config: Config):
     zeroconf_path = config.root / "homeassistant/generated/zeroconf.py"
     config.cache["zeroconf"] = content = generate_and_validate(integrations)
 
+    if config.specific_integrations:
+        return
+
     with open(str(zeroconf_path)) as fp:
         current = fp.read().strip()
         if current != content: