Fix Withings authentication to leverage default redirect URI (#79158)

tests/components/withings/common.py

@@ -201,14 +201,14 @@ class ComponentFactory:
             self._hass,
             {
                 "flow_id": result["flow_id"],
-                "redirect_uri": "http://127.0.0.1:8080/auth/external/callback",
+                "redirect_uri": "https://example.com/auth/external/callback",
             },
         )
         assert result["type"] == data_entry_flow.FlowResultType.EXTERNAL_STEP
         assert result["url"] == (
             "https://account.withings.com/oauth2_user/authorize2?"
             f"response_type=code&client_id={self._client_id}&"
-            "redirect_uri=http://127.0.0.1:8080/auth/external/callback&"
+            "redirect_uri=https://example.com/auth/external/callback&"
             f"state={state}"
             "&scope=user.info,user.metrics,user.activity,user.sleepevents"
         )

tests/components/withings/conftest.py

@@ -13,7 +13,10 @@ from tests.test_util.aiohttp import AiohttpClientMocker
 
 @pytest.fixture()
 def component_factory(
-    hass: HomeAssistant, hass_client_no_auth, aioclient_mock: AiohttpClientMocker
+    hass: HomeAssistant,
+    hass_client_no_auth,
+    aioclient_mock: AiohttpClientMocker,
+    current_request_with_host: None,
 ):
     """Return a factory for initializing the withings component."""
     with patch(