[3.12] gh-107895: Fix test_asyncio.test_runners when run it in CPython's "development mode" (GH-108168) (#108196)

gh-107895: Fix test_asyncio.test_runners when run it in CPython's "development mode" (GH-108168)
(cherry picked from commit 014a5b71e7538926ae1c03c8c5ea13c96e741be3)

Co-authored-by: Joon Hwan 김준환 <xncbf12@gmail.com>