GH-2917: Add AbstractConnectionFactory.setAddresses(List<String>)

Fixes: #2917

In Spring Boot `3.4.0` the `org.springframework.boot.autoconfigure.amqp.RabbitProperties#getAddresses()`
returns a `List<String>` while it previously returned a `String`.
This makes it incompatible with `AbstractConnectionFactory.setAddresses` which accepts a `String`.
Previously we could do `cachingConnectionFactory.setAddresses(rabbitProperties.getAddresses());`,
but now have to go with a `cachingConnectionFactory.setAddresses(String.join(",", rabbitProperties.getAddresses()))`

* Expose `AbstractConnectionFactory.setAddresses(List<String>)` for the mentioned convenience to be able to use `List<String>`
as an alternative to comma-separated string

Author: artembilan

spring-rabbit/src/main/java/org/springframework/amqp/rabbit/connection/AbstractConnectionFactory.java

@@ -344,7 +344,16 @@ public int getPort() {
 
 	/**
 	 * Set addresses for clustering. This property overrides the host+port properties if not empty.
-	 * @param addresses list of addresses with form "host[:port],..."
+	 * @param addresses list of addresses in form {@code host[:port]}.
+	 * @since 3.2.1
+	 */
+	public void setAddresses(List<String> addresses) {
+		Assert.notEmpty(addresses, "Addresses must not be empty");
+		setAddresses(String.join(",", addresses));
+	}
+	/**
+	 * Set addresses for clustering. This property overrides the host+port properties if not empty.
+	 * @param addresses list of addresses with form {@code host1[:port1],host2[:port2],...}.
 	 */
 	public void setAddresses(String addresses) {
 		this.lock.lock();

spring-rabbit/src/test/java/org/springframework/amqp/rabbit/connection/AbstractConnectionFactoryTests.java

@@ -33,6 +33,7 @@
 import static org.mockito.Mockito.verify;
 
 import java.util.Collections;
+import java.util.List;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -110,7 +111,7 @@ public void onClose(Connection connection) {
 
 		verify(mockConnectionFactory, times(1)).newConnection(any(ExecutorService.class), anyString());
 
-		connectionFactory.setAddresses("foo:5672,bar:5672");
+		connectionFactory.setAddresses(List.of("foo:5672", "bar:5672"));
 		connectionFactory.setAddressShuffleMode(AddressShuffleMode.NONE);
 		con = connectionFactory.createConnection();
 		assertThat(called.get()).isEqualTo(1);