As an enhancement to https://github.com/localstack/localstack/pull/1194

It would be really helpful to send the Lambda name, either as data, a header, or as part of the URL.

At code location: https://github.com/localstack/localstack/blob/03c6f4bf250edd18eb818ed65090f508636b0bff/localstack/services/awslambda/lambda_api.py#L696

I can likely open a PR to handle this given some feedback on the feature and potential design.

Right now all I see is the following (using `npx http-echo-server`):
```
[socket#8] event: data
--> POST / HTTP/1.1
--> Host: 192.168.1.x:3000
--> User-Agent: python-requests/2.22.0
--> Accept-Encoding: gzip, deflate
--> Accept: */*
--> Connection: keep-alive
--> Content-Length: 9
--> Content-Type: application/x-www-form-urlencoded
-->
-->
[socket#8] event: data
--> Name=test
```
'attributes': msg.get('Attributes', {}),
                'messageAttributes': msg.get('MessageAttributes', {}),
                'md5OfMessageAttributes': msg.get('MD5OfMessageAttributes'),
                'sqs': True,
            })
        event = {'Records': records}
        
        run_lambda(event=event, context={}, func_arn=lambda_arn, asynchronous=True, callback=delete_messages)
    def listener_loop(*args):
        while True:
            try:
                sources = get_event_sources(source_arn=r'.*:sqs:.*')
                if not sources:
                    
                    
                    
                    SQS_LISTENER_THREAD.pop('_thread_')
                    return
                sqs_client = aws_stack.connect_to_service('sqs')
                for source in sources:
                    queue_arn = source['EventSourceArn']
                    lambda_arn = source['FunctionArn']
                    batch_size = max(min(source.get('BatchSize', 1), 10), 1)
                    try:
                        region_name = queue_arn.split(':')[3]
                        queue_url = aws_stack.sqs_queue_url_for_arn(queue_arn)
                        result = sqs_client.receive_message(
                            QueueUrl=queue_url,
                            MessageAttributeNames=['All'],
                            MaxNumberOfMessages=batch_size