[3.12] gh-126083: Fix a reference leak in `asyncio.Task` when reinitializing with new non-`None` context (GH-126103) (#126230)

gh-126083: Fix a reference leak in `asyncio.Task` when reinitializing with new non-`None` context (GH-126103)
(cherry picked from commit d07dcce6935364cab807e0df931ed09b088ade69)

Co-authored-by: Nico-Posada <102486290+Nico-Posada@users.noreply.github.com>