Await connection in debugpy

还没有人认领这个 Issue。

* **asyncpg version**: 0.27.0
* **PostgreSQL version**: 15.1
* **Do you use a PostgreSQL SaaS? If so, which? Can you reproduce
the issue with a local PostgreSQL install?**:
* **Python version**: 3.11
* **Platform**: starlite
* **Do you use pgbouncer?**: no
* **Did you install asyncpg with pip?**: poetry
* **If you built asyncpg locally, which version of Cython did you use?**: n/a
* **Can the issue be reproduced under both asyncio and
[uvloop](https://github.com/magicstack/uvloop)?**: not sure

So I am using debugpy for debugging in vscode. Essentially this: `python -m debugpy --listen 0.0.0.0:5678 ./myscript.py`
I am using asyncpg + sqlalchemy. Specifically an [AsyncSession](https://docs.sqlalchemy.org/en/20/orm/extensions/asyncio.html#preventing-implicit-io-when-using-asyncsession)

When I set a breakpoint and use the debug console I can normally await async functions.
But when I do this on an async query I get this error:
```
app_dev | Traceback (most recent call last):
app_dev | File "/usr/local/lib/python3.11/site-packages/sqlalchemy/dialects/postgresql/asyncpg.py", line 755, in _start_transaction
app_dev | await self._transaction.start()
app_dev | File "/usr/local/lib/python3.11/site-packages/asyncpg/transaction.py", line 138, in start
app_dev | await self._connection.execute(query)
app_dev | File "/usr/local/lib/python3.11/site-packages/asyncpg/connection.py", line 317, in execute
app_dev | return await self._protocol.query(query, timeout)
app_dev | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
app_dev | File "asyncpg/protocol/protocol.pyx", line 323, in query
app_dev | File "asyncpg/protocol/protocol.pyx", line 707, in asyncpg.protocol.protocol.BaseProtocol._check_state
app_dev | asyncpg.exceptions._base.InterfaceError: cannot perform operation: another operation is in progress
```

Is there a way I can `await` async queries in the debug console?
Please let me know if this is a sqlAlchemy issue.

首先使用 Python 3.11、asyncpg 0.27.0、PostgreSQL 15.1 和 SQLAlchemy AsyncSession 重现 debugpy 命令，然后检查并发操作错误的来源。确定该行为属于 asyncpg、SQLAlchemy 还是 debugpy；完成工作的必要条件是确认修复有效，或明确记录解决方案。

由索引模型根据 Issue 内容生成。