Add exception-translations rule to quality_scale pytest validation (#131914)

* Add exception-translations rule to quality_scale pytest validation

* Adjust

* Return empty dict if file is missing

* Fix

* Improve typing

* Address comments

* Update tests/components/conftest.py

* Update tests/components/conftest.py

* Update tests/components/conftest.py

---------

Co-authored-by: Robert Resch <robert@resch.dev>

tests/common.py

@@ -15,7 +15,7 @@ from collections.abc import (
 )
 from contextlib import asynccontextmanager, contextmanager, suppress
 from datetime import UTC, datetime, timedelta
-from enum import Enum
+from enum import Enum, StrEnum
 import functools as ft
 from functools import lru_cache
 from io import StringIO
@@ -108,7 +108,7 @@ from homeassistant.util.json import (
 from homeassistant.util.signal_type import SignalType
 import homeassistant.util.ulid as ulid_util
 from homeassistant.util.unit_system import METRIC_SYSTEM
-import homeassistant.util.yaml.loader as yaml_loader
+from homeassistant.util.yaml import load_yaml_dict, loader as yaml_loader
 
 from .testing_config.custom_components.test_constant_deprecation import (
     import_deprecated_constant,
@@ -122,6 +122,14 @@ CLIENT_ID = "https://example.com/app"
 CLIENT_REDIRECT_URI = "https://example.com/app/callback"
 
 
+class QualityScaleStatus(StrEnum):
+    """Source of core configuration."""
+
+    DONE = "done"
+    EXEMPT = "exempt"
+    TODO = "todo"
+
+
 async def async_get_device_automations(
     hass: HomeAssistant,
     automation_type: device_automation.DeviceAutomationType,
@@ -1832,3 +1840,22 @@ def reset_translation_cache(hass: HomeAssistant, components: list[str]) -> None:
         for loaded_components in loaded_categories.values():
             for component_to_unload in components:
                 loaded_components.pop(component_to_unload, None)
+
+
+@lru_cache
+def get_quality_scale(integration: str) -> dict[str, QualityScaleStatus]:
+    """Load quality scale for integration."""
+    quality_scale_file = pathlib.Path(
+        f"homeassistant/components/{integration}/quality_scale.yaml"
+    )
+    if not quality_scale_file.exists():
+        return {}
+    raw = load_yaml_dict(quality_scale_file)
+    return {
+        rule: (
+            QualityScaleStatus(details)
+            if isinstance(details, str)
+            else QualityScaleStatus(details["status"])
+        )
+        for rule, details in raw["rules"].items()
+    }