Improve generated default name for a @JmsListener subscription

Prior to this commit, when using durable subscribers with @JmsListener
methods that do not specify a custom subscription name the generated
default subscription name was always
org.springframework.jms.listener.adapter.MessagingMessageListenerAdapter.
Consequently, multiple such @JmsListener methods were assigned the
same subscription name which violates the uniqueness requirement.

To address this, MessagingMessageListenerAdapter now implements
SubscriptionNameProvider and generates the subscription name based on
the following rules.

- if the InvocableHandlerMethod is present, the subscription name will
  take the form of handlerMethod.getBeanType().getName() + "#" +
  handlerMethod.getMethod().getName().
- otherwise, getClass().getName() is used, which is analogous to the
  previous behavior.

Closes gh-29790

spring-jms/src/main/java/org/springframework/jms/listener/adapter/MessagingMessageListenerAdapter.java

@@ -20,6 +20,7 @@ import jakarta.jms.JMSException;
 import jakarta.jms.Session;
 
 import org.springframework.core.MethodParameter;
+import org.springframework.jms.listener.SubscriptionNameProvider;
 import org.springframework.jms.support.JmsHeaderMapper;
 import org.springframework.jms.support.converter.MessageConversionException;
 import org.springframework.lang.Nullable;
@@ -48,7 +49,8 @@ import org.springframework.util.Assert;
  * @see JmsHeaderMapper
  * @see InvocableHandlerMethod
  */
-public class MessagingMessageListenerAdapter extends AbstractAdaptableMessageListener {
+public class MessagingMessageListenerAdapter extends AbstractAdaptableMessageListener
+		implements SubscriptionNameProvider {
 
 	@Nullable
 	private InvocableHandlerMethod handlerMethod;
@@ -67,6 +69,16 @@ public class MessagingMessageListenerAdapter extends AbstractAdaptableMessageLis
 		return this.handlerMethod;
 	}
 
+	@Override
+	public String getSubscriptionName() {
+		if (this.handlerMethod != null) {
+			return this.handlerMethod.getBeanType().getName() + "#" + this.handlerMethod.getMethod().getName();
+		}
+		else {
+			return this.getClass().getName();
+		}
+	}
+
 
 	@Override
 	public void onMessage(jakarta.jms.Message jmsMessage, @Nullable Session session) throws JMSException {