override_max_retries is never deleted from task

[marcelombj]

I'm implementing a decorator to retry if two tasks are running simultaneously. For this decorator, the approach that I found to schedule later is the retry mechanism with max_retries + number_or_retries_of_this_decorator. I don't want this retry to impact the original max_retries from the original implementation.

But during the tests with multiple treads, I realized that the code below is never reached, and the override_max_retries variable is reused for different tasks.

https://github.com/celery/celery/blob/main/celery/app/autoretry.py#L62-L63

I'm wondering if this is a bug or if I'm doing something wrong. But if I use the max_retry of retry fun for one task and run again another one, I'm retrying more than it should the second.