Support code attributes for celery, pika and aio-pika consumer span

[wangzlei]

Description of changes:
Celery, Pika, and Aio-Pika all support consumer callbacks. The consumer spans represent not only the message retrieval action, but also the execution of the callback function that processes the message.

This change adds code information about the callback function to the consumer span attributes.

{
    "kind": "SpanKind.CONSUMER",
    "attributes": {
        "code.function.name": "tasks.add_numbers",
        "code.file.path": "/Volumes/workplace/extension/aws-otel-python-instrumentation/samples/celery/tasks.py",
        "code.line.number": 14,
        "celery.action": "run",
        "celery.state": "SUCCESS",
        "messaging.destination": "celery",
        "celery.delivery_info": "{'exchange': '', 'routing_key': 'celery', 'priority': 0, 'redelivered': False}",
        "messaging.message.id": "8aaec4dc-31b0-4705-9c90-6f8eb1a9a0a9",
        "celery.reply_to": "40d7205e-2128-3d9e-afcf-07607c40f3ef",
        "celery.hostname": "gen88041@7cf34de1a5ba",
        "celery.task_name": "tasks.add_numbers"
    },

For Producer span, the code attributes can be achieved by stacktrace-based solution

For Confluent-Kafka, Kafka-Python, and AioKafka, these three libraries do not support consumer callbacks. Their consumer spans therefore represent only the message retrieval action, and accordingly use the same stacktrace-based solution.

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