Start building against Spring Kafka 2.8.3 snapshots

See gh-29759

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/kafka/ConcurrentKafkaListenerContainerFactoryConfigurer.java

@@ -169,6 +169,7 @@ public class ConcurrentKafkaListenerContainerFactoryConfigurer {
 		configureContainer(listenerFactory.getContainerProperties());
 	}
 
+	@SuppressWarnings("deprecation")
 	private void configureListenerFactory(ConcurrentKafkaListenerContainerFactory<Object, Object> factory) {
 		PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
 		Listener properties = this.properties.getListener();

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/kafka/KafkaAutoConfigurationTests.java

@@ -512,6 +512,7 @@ class KafkaAutoConfigurationTests {
 	}
 
 	@Test
+	@Deprecated
 	void testConcurrentKafkaListenerContainerFactoryWithCustomErrorHandler() {
 		this.contextRunner.withBean("errorHandler", ErrorHandler.class, () -> mock(ErrorHandler.class))
 				.run((context) -> {
@@ -522,6 +523,7 @@ class KafkaAutoConfigurationTests {
 	}
 
 	@Test
+	@Deprecated
 	void concurrentKafkaListenerContainerFactoryInBatchModeShouldUseBatchErrorHandler() {
 		this.contextRunner.withBean("batchErrorHandler", BatchErrorHandler.class, () -> mock(BatchErrorHandler.class))
 				.withPropertyValues("spring.kafka.listener.type=batch").run((context) -> {

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -1693,7 +1693,7 @@ bom {
 			]
 		}
 	}
-	library("Spring Kafka", "2.8.2") {
+	library("Spring Kafka", "2.8.3-SNAPSHOT") {
 		group("org.springframework.kafka") {
 			modules = [
 				"spring-kafka",

spring-boot-project/spring-boot-docs/src/docs/asciidoc/messaging/kafka.adoc

@@ -42,7 +42,7 @@ The following component creates a listener endpoint on the `someTopic` topic:
 include::code:MyBean[]
 
 If a `KafkaTransactionManager` bean is defined, it is automatically associated to the container factory.
-Similarly, if a `RecordFilterStrategy`, `ErrorHandler`, `CommonErrorHandler`, `AfterRollbackProcessor` or `ConsumerAwareRebalanceListener` bean is defined, it is automatically associated to the default factory.
+Similarly, if a `RecordFilterStrategy`, `CommonErrorHandler`, `AfterRollbackProcessor` or `ConsumerAwareRebalanceListener` bean is defined, it is automatically associated to the default factory.
 
 Depending on the listener type, a `RecordMessageConverter` or `BatchMessageConverter` bean is associated to the default factory.
 If only a `RecordMessageConverter` bean is present for a batch listener, it is wrapped in a `BatchMessageConverter`.