Allow non-async functions in device automation (#72147)

* Remove async requirement for get_capabilities_func

* Add comment

* Remove async requirement for get_automations_func

* Update homeassistant/components/device_automation/__init__.py

Co-authored-by: Erik Montnemery <erik@montnemery.com>

* Update homeassistant/components/device_automation/__init__.py

Co-authored-by: Erik Montnemery <erik@montnemery.com>

* Add Exception to type hint

Co-authored-by: Erik Montnemery <erik@montnemery.com>

homeassistant/components/device_automation/__init__.py

@@ -189,22 +189,42 @@ def _async_set_entity_device_automation_metadata(
     automation["metadata"]["secondary"] = bool(entry.entity_category or entry.hidden_by)
 
 
+async def _async_get_automation_for_device(
+    hass: HomeAssistant,
+    platform: DeviceAutomationPlatformType,
+    function_name: str,
+    device_id: str,
+) -> list[dict[str, Any]]:
+    """List device automations."""
+    automations = getattr(platform, function_name)(hass, device_id)
+    if asyncio.iscoroutine(automations):
+        # Using a coroutine to get device automations is deprecated
+        # enable warning when core is fully migrated
+        # then remove in Home Assistant Core xxxx.xx
+        return await automations  # type: ignore[no-any-return]
+    return automations  # type: ignore[no-any-return]
+
+
 async def _async_get_device_automations_from_domain(
-    hass, domain, automation_type, device_ids, return_exceptions
+    hass: HomeAssistant,
-):
+    domain: str,
+    automation_type: DeviceAutomationType,
+    device_ids: Iterable[str],
+    return_exceptions: bool,
+) -> list[list[dict[str, Any]] | Exception]:
     """List device automations."""
     try:
         platform = await async_get_device_automation_platform(
             hass, domain, automation_type
         )
     except InvalidDeviceAutomationConfig:
-        return {}
+        return []
 
     function_name = automation_type.value.get_automations_func
 
-    return await asyncio.gather(
+    return await asyncio.gather(  # type: ignore[no-any-return]
         *(
-            getattr(platform, function_name)(hass, device_id)
+            _async_get_automation_for_device(hass, platform, function_name, device_id)
             for device_id in device_ids
         ),
         return_exceptions=return_exceptions,
@@ -290,7 +310,12 @@ async def _async_get_device_automation_capabilities(
         return {}
 
     try:
-        capabilities = await getattr(platform, function_name)(hass, automation)
+        capabilities = getattr(platform, function_name)(hass, automation)
+        if asyncio.iscoroutine(capabilities):
+            # Using a coroutine to get device automation capabitilites is deprecated
+            # enable warning when core is fully migrated
+            # then remove in Home Assistant Core xxxx.xx
+            capabilities = await capabilities
     except InvalidDeviceAutomationConfig:
         return {}