Fix typing issue in `MetaData.reflect()` with asyncio.

Fix typing issue in `MetaData.reflect()` with asyncio.

Fixed typing regression caused by PR :ticket:`11055` in version 2.0.29 that
attempted to add ``ParamSpec`` to the asyncio ``run_sync()`` methods, where
using :meth:`_asyncio.AsyncConnection.run_sync` with
meth:`_schema.MetaData.reflect` would fail on mypy due to a bug.
See https://github.com/python/mypy/issues/17093 for details.
Pull request courtesy of Francisco R. Del Roio

Fixes: #11200
Closes: #11201
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/11201
Pull-request-sha: 49e10e0d2a7bbadf471212033e25b7616b99c092

Change-Id: Ie2ebaebd1bc1ee1b865b78561cb6cb8937e85eca