Reset the threading.local _hass object every time (#101728)

* Reset the threading.local _hass object every time

* Remove reset from hass fixture

tests/conftest.py

@@ -376,6 +376,13 @@ def verify_cleanup(
         )
 
 
+@pytest.fixture(autouse=True)
+def reset_hass_threading_local_object() -> Generator[None, None, None]:
+    """Reset the _Hass threading.local object for every test case."""
+    yield
+    ha._hass.__dict__.clear()
+
+
 @pytest.fixture(autouse=True)
 def bcrypt_cost() -> Generator[None, None, None]:
     """Run with reduced rounds during tests, to speed up uses."""
@@ -559,9 +566,6 @@ async def hass(
     # Restore timezone, it is set when creating the hass object
     dt_util.DEFAULT_TIME_ZONE = orig_tz
 
-    # Reset the _Hass threading.local object
-    ha._hass.__dict__.clear()
-
     for ex in exceptions:
         if (
             request.module.__name__,