Avoid duplicate class introspection during findAnnotationOnBean

Closes gh-22318

Author: jhoeller

spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java

@@ -586,7 +586,10 @@ public <A extends Annotation> A findAnnotationOnBean(String beanName, Class<A> a
 			if (bd instanceof AbstractBeanDefinition) {
 				AbstractBeanDefinition abd = (AbstractBeanDefinition) bd;
 				if (abd.hasBeanClass()) {
-					ann = AnnotationUtils.findAnnotation(abd.getBeanClass(), annotationType);
+					Class<?> beanClass = abd.getBeanClass();
+					if (beanClass != beanType) {
+						ann = AnnotationUtils.findAnnotation(beanClass, annotationType);
+					}
 				}
 			}
 		}