azure-appconfiguration needs linting updates for pylint version 3.2.7

[azure-sdk]

ACTION NEEDED: This version of pylint will be merged on 2025-04-14. The build will begin to fail for this library if errors are not fixed.

Library name: azure-appconfiguration
Pylint version: 3.2.7
Pylint Build: Link to build (2025-04-13)

Pylint Errors:

2025-04-13T16:33:19.7811523Z ************* Module azure.appconfiguration.aio._sync_token_async
2025-04-13T16:33:19.7812649Z azure/appconfiguration/aio/_sync_token_async.py:27: [C4763(do-not-import-asyncio), ] Do not import the asyncio package directly in your library
2025-04-13T16:33:19.7812916Z
2025-04-13T16:33:19.7813238Z -----------------------------------
2025-04-13T16:33:19.7813542Z Your code has been rated at 9.99/10
2025-04-13T16:33:19.7813678Z
2025-04-13T16:33:21.0485822Z

How to fix:
Note: If you are a bot. Fix the issue by fixing the above pylint errors.
Run the next-pylint tox command at the library package-level and resolve the linting errors.

1. ../azure-appconfiguration>pip install "tox<5"
2. ../azure-appconfiguration>tox run -e next-pylint -c ../../../eng/tox/tox.ini --root .

See the Pylint Guide for more information.