Raise in EntityComponent.async_prepare_reload on configuration error (#101267)

Co-authored-by: Franck Nijhof <git@frenck.dev>

homeassistant/config.py

@@ -15,7 +15,7 @@ import os
 from pathlib import Path
 import shutil
 from types import ModuleType
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, Literal, overload
 
 from awesomeversion import AwesomeVersion
 import voluptuous as vol
@@ -851,6 +851,36 @@ def _get_log_message_and_stack_print_pref(
     return (log_message, show_stack_trace, placeholders)
 
 
+# The complicated overloads are due to a limitation in mypy, details in
+# https://github.com/python/mypy/issues/7333
+@overload
+async def async_process_component_and_handle_errors(
+    hass: HomeAssistant,
+    config: ConfigType,
+    integration: Integration,
+) -> ConfigType | None: ...
+
+
+@overload
+async def async_process_component_and_handle_errors(
+    hass: HomeAssistant,
+    config: ConfigType,
+    integration: Integration,
+    *,
+    raise_on_failure: Literal[True],
+) -> ConfigType: ...
+
+
+@overload
+async def async_process_component_and_handle_errors(
+    hass: HomeAssistant,
+    config: ConfigType,
+    integration: Integration,
+    *,
+    raise_on_failure: bool,
+) -> ConfigType | None: ...
+
+
 async def async_process_component_and_handle_errors(
     hass: HomeAssistant,
     config: ConfigType,