Small improvements for Switch as X (#68079)

* Small improvements forr Switch as X

* Test improvements

* Remove intregration tests from config flow test

tests/components/switch_as_x/conftest.py

@@ -0,0 +1,16 @@
+"""Fixtures for the Switch as X integration tests."""
+from __future__ import annotations
+
+from collections.abc import Generator
+from unittest.mock import AsyncMock, patch
+
+import pytest
+
+
+@pytest.fixture
+def mock_setup_entry() -> Generator[AsyncMock, None, None]:
+    """Mock setting up a config entry."""
+    with patch(
+        "homeassistant.components.switch_as_x.async_setup_entry", return_value=True
+    ) as mock_setup:
+        yield mock_setup