Upgrade to Kafka 2.6.0

Closes gh-22731

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/KafkaMetricsAutoConfigurationTests.java

@@ -16,12 +16,19 @@
 
 package org.springframework.boot.actuate.autoconfigure.metrics;
 
+import java.util.regex.Pattern;
+
+import org.apache.kafka.streams.StreamsBuilder;
+import org.apache.kafka.streams.kstream.KStream;
+import org.apache.kafka.streams.kstream.KTable;
+import org.apache.kafka.streams.kstream.Materialized;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.actuate.autoconfigure.metrics.test.MetricsRun;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.kafka.annotation.EnableKafkaStreams;
 import org.springframework.kafka.config.StreamsBuilderFactoryBean;
@@ -93,6 +100,12 @@ class KafkaMetricsAutoConfigurationTests {
 	@EnableKafkaStreams
 	static class EnableKafkaStreamsConfiguration {
 
+		@Bean
+		public KTable<?, ?> table(StreamsBuilder builder) {
+			KStream<Object, Object> stream = builder.stream(Pattern.compile("test"));
+			return stream.groupByKey().count(Materialized.as("store"));
+		}
+
 	}
 
 }

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

@@ -18,9 +18,14 @@ package org.springframework.boot.autoconfigure.kafka;
 
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
+import java.util.regex.Pattern;
 
 import org.apache.kafka.clients.admin.NewTopic;
 import org.apache.kafka.clients.producer.Producer;
+import org.apache.kafka.streams.StreamsBuilder;
+import org.apache.kafka.streams.kstream.KStream;
+import org.apache.kafka.streams.kstream.KTable;
+import org.apache.kafka.streams.kstream.Materialized;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 
@@ -124,6 +129,12 @@ class KafkaAutoConfigurationIntegrationTests {
 	@EnableKafkaStreams
 	static class KafkaStreamsConfig {
 
+		@Bean
+		public KTable<?, ?> table(StreamsBuilder builder) {
+			KStream<Object, Object> stream = builder.stream(Pattern.compile("test"));
+			return stream.groupByKey().count(Materialized.as("store"));
+		}
+
 	}
 
 	static class Listener {

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

@@ -892,7 +892,7 @@ bom {
 			]
 		}
 	}
-	library("Kafka", "2.5.0") {
+	library("Kafka", "2.6.0") {
 		group("org.apache.kafka") {
 			modules = [
 				"connect-api",