[3.13] gh-126080: fix UAF on task->task_context in task_call_step_soon due to an evil loop.__getattribute__ (GH-126120) #126250
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(cherry picked from commit 0e86655)
Co-authored-by: Bénédikt Tran 10796600+picnixz@users.noreply.github.com
task_call_step_soonin_asynciomodule.c(with admittedly ridiculous setup) #126080