Fix custom test PulsarProducerFactory

Spring Pulsar 1.1.x introduced a new method `getPulsarClient`
on `PulsarProducerFactory` and the PulsarBinderIntegrationTests
has a custom factory that must be updated in order to run
on both Pulsar 1.0.x and 1.1.x (i.e. Spring Boot 3.2.x and 3.3.x).

binders/pulsar-binder/spring-cloud-stream-binder-pulsar/src/test/java/org/springframework/cloud/stream/binder/pulsar/PulsarBinderIntegrationTests.java

@@ -26,6 +26,7 @@
 import java.util.function.Supplier;
 
 import org.apache.pulsar.client.api.Producer;
+import org.apache.pulsar.client.api.PulsarClient;
 import org.apache.pulsar.client.api.Schema;
 import org.apache.pulsar.client.impl.schema.JSONSchema;
 import org.apache.pulsar.common.schema.KeyValue;
@@ -637,8 +638,8 @@ public Consumer<String> textLogger() {
 	static class BinderAndBindingPropsTestConfig {
 
 		@Bean
-		TrackingProducerFactoryBeanPostProcessor trackingProducerFactory() {
-			return new TrackingProducerFactoryBeanPostProcessor();
+		TrackingProducerFactoryBeanPostProcessor trackingProducerFactory(PulsarClient pulsarClient) {
+			return new TrackingProducerFactoryBeanPostProcessor(pulsarClient);
 		}
 
 		@Bean
@@ -650,10 +651,16 @@ TrackingConsumerFactoryBeanPostProcessor trackingConsumerFactory() {
 
 	static class TrackingProducerFactoryBeanPostProcessor implements BeanPostProcessor {
 
+		private final PulsarClient pulsarClient;
+
+		TrackingProducerFactoryBeanPostProcessor(PulsarClient pulsarClient) {
+			this.pulsarClient = pulsarClient;
+		}
+
 		@Override
 		public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
 			if (bean instanceof DefaultPulsarProducerFactory defaultFactory) {
-				return new TrackingProducerFactory(defaultFactory);
+				return new TrackingProducerFactory(defaultFactory, this.pulsarClient);
 			}
 			return bean;
 		}
@@ -664,10 +671,18 @@ static class TrackingProducerFactory implements PulsarProducerFactory<String> {
 
 		private final DefaultPulsarProducerFactory<String> trackedProducerFactory;
 
+		private final PulsarClient pulsarClient;
+
 		List<Producer<String>> producersCreated = new ArrayList<>();
 
-		TrackingProducerFactory(DefaultPulsarProducerFactory<String> trackedProducerFactory) {
+		TrackingProducerFactory(DefaultPulsarProducerFactory<String> trackedProducerFactory, PulsarClient pulsarClient) {
 			this.trackedProducerFactory = trackedProducerFactory;
+			this.pulsarClient = pulsarClient;
+		}
+
+		// This is required in PulsarProducerFactory in Spring Pulsar 1.1.x (i.e. Spring Boot 3.3.x)
+		public PulsarClient getPulsarClient() {
+			return this.pulsarClient;
 		}
 
 		@Override