Break apart zeroconf integration to prepare for WebSocket API (#143490)

tests/conftest.py

@@ -1346,7 +1346,10 @@ def mock_zeroconf() -> Generator[MagicMock]:
 
     with (
         patch("homeassistant.components.zeroconf.HaZeroconf", autospec=True) as mock_zc,
-        patch("homeassistant.components.zeroconf.AsyncServiceBrowser", autospec=True),
+        patch(
+            "homeassistant.components.zeroconf.discovery.AsyncServiceBrowser",
+            autospec=True,
+        ),
     ):
         zc = mock_zc.return_value
         # DNSCache has strong Cython type checks, and MagicMock does not work