fix(aci): Retry process_delayed_workflows timeouts

[kcons]

Timeouts are expected here and assumed transient, and the existing retry decorator and config don't support retrying ProcessingDeadlineExceeded.
So, we add a new task decorator to trigger retries on timeouts. This avoids opening the door to other BaseExceptions and keeps it opt-in as designed.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
27216	1	27215	240

View the top 1 failed test(s) by shortest run time

tests.sentry.tasks.test_base::test_retry_on

Stack Traces | 0.048s run time

#x1B[1m#x1B[.../sentry/tasks/base.py#x1B[0m:248: in wrapped
    return func(*args, **kwargs)
#x1B[1m#x1B[.../sentry/silo/base.py#x1B[0m:165: in override
    return handler(*args, **kwargs)
#x1B[1m#x1B[.../sentry/tasks/base.py#x1B[0m:51: in handle
    raise self.AvailabilityError(message)
#x1B[1m#x1B[31mE   sentry.silo.base.SiloLimit.AvailabilityError: Cannot call or spawn retry_on_task in REGION,#x1B[0m

#x1B[33mDuring handling of the above exception, another exception occurred:#x1B[0m
#x1B[1m#x1B[.../sentry/tasks/test_base.py#x1B[0m:168: in test_retry_on
    retry_on_task("bruh")
#x1B[1m#x1B[.../sentry/tasks/base.py#x1B[0m:262: in wrapped
    retry_task(exc)
#x1B[1m#x1B[.../sentry/taskworker/retry.py#x1B[0m:59: in retry_task
    assert False, "unreachable"
#x1B[1m#x1B[31mE   AssertionError: unreachable#x1B[0m

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