fix use_async_effect cleanup not executed when dependencies change

[Archmonger]

Description

• Fix use_async_effect cleanup not executed when dependencies change #1327

Fixed a bug where use_async_effect cleanup functions were not being executed when dependencies changed.

This required removing shutdown_timeout parameter from use_async_effect. It is now up to the user to shield against asyncio.CancelledError for sensitive operations (such as database queries).

Checklist

Please update this checklist as you complete each item:

• Tests have been developed for bug fixes or new functionality.
• The changelog has been updated, if necessary.
• Documentation has been updated, if necessary.
• GitHub Issues closed by this PR have been linked.

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