opentelemetry-instrumentation-aiokafka: test warnings — Unclosed AIOKafkaProducer and unawaited coroutine #4383

Describe your environment

OS: any
Python version: 3.13, 3.14
Package version: opentelemetry-instrumentation-aiokafka 0.62b0.dev

What happened?

Running the aiokafka instrumentation test suite produces two warnings:

1. ERROR asyncio:base_events.py: Unclosed AIOKafkaProducer intest_send_and_wait. the test creates a producer but never calls producer.stop(), leaving the resource unclosed.

2. RuntimeWarning: coroutine 'AsyncMockMixin._execute_mock_call' was never awaited in test_wrap_getmany. the _create_consumer_span parameter is typed as mock.MagicMock but the real function is async. When the code calls await _create_consumer_span(...) and then record_span.get_span_context(), the MagicMock auto-creates coroutine return values that are never awaited.

Steps to Reproduce

tox -e py3-test-instrumentation-aiokafka -- -v

Observe the Unclosed AIOKafkaProducer error log during test_send_and_wait
and the RuntimeWarning after the test session completes.

Expected Result

Tests run cleanly with no resource warnings or unawaited coroutine warnings.

Actual Result

ERROR    asyncio:base_events.py:1871 Unclosed AIOKafkaProducer
producer: <aiokafka.producer.producer.AIOKafkaProducer object at 0x...>

RuntimeWarning: coroutine 'AsyncMockMixin._execute_mock_call' was never awaited

Additional context

Neither warning causes test failures — all 17 tests pass. These are cosmetic
issues but they add noise to the test output and could mask real warnings.

Would you like to implement a fix?

Yes, PR opened #4384