Avoid calling entry.async_migrate in sonarr tests (#113557)

We should setup the the config entry instead of calling the
migrator directly

This fix was reverted out in #113553

tests/components/sonarr/test_init.py

@@ -105,7 +105,9 @@ async def test_migrate_config_entry(hass: HomeAssistant) -> None:
     assert entry.version == 1
     assert not entry.unique_id
 
-    await entry.async_migrate(hass)
+    with patch("homeassistant.components.sonarr.async_setup_entry", return_value=True):
+        await hass.config_entries.async_setup(entry.entry_id)
+        await hass.async_block_till_done()
 
     assert entry.data == {
         CONF_API_KEY: "MOCK_API_KEY",