RabbitMQ tracing.attribute-headers not set in Otel Spans

[Crustack]

Maybe I am mistaken, but it seems the mp.messaging.[incoming/outgoing].*.tracing.attribute-headers does not work anymore?
I tried setting it in an example application, the custom header is also present in the internally created RabbitMQTrace but its not set in the OpenTelemetry span.

In the codebase I also can't find any usage of RabbitMQConnectorCommonConfiguration.getTracingAttributeHeaders() anywhere.
It was used in First commit of rabbitmq connector (b1e6ad8) but all usages have later been removed by Use OpenTelemetry Instrumenter (2d48857)

I guess it should be used here?

smallrye-reactive-messaging/smallrye-reactive-messaging-rabbitmq/src/main/java/io/smallrye/reactive/messaging/rabbitmq/tracing/RabbitMQTraceAttributesExtractor.java

Lines 25 to 29 in 5db863e

	public void onStart(
	final AttributesBuilder attributes,
	final Context parentContext, final RabbitMQTrace rabbitMQTrace) {
	attributes.put(MESSAGING_RABBITMQ_DESTINATION_ROUTING_KEY, rabbitMQTrace.getRoutingKey());
	}