AnnotationEnhancer always return the old attributes

[crmky]

In what version(s) of Spring for Apache Kafka are you seeing this issue?

3.1.7

Describe the bug

It seems AnnotationEnhancer introduced by #1818 always return old attributes instead of new attributes.

Refer to

spring-kafka/spring-kafka/src/main/java/org/springframework/kafka/annotation/KafkaListenerAnnotationBeanPostProcessor.java

Line 363 in 78d7724

return attrs;

[sobychacko]

Looks like a bug. We will look at this today. Thanks!

[sobychacko]

The newAttr is a reference to the old map - attr. However, there is a chance that the enhancer impls could change that reference. We will fix it.