Code Refactoring KafkaMessageListenerContainer

Fixes: spring-projects#3090 

* remove `checkAckMode` because `ContainerProperties.ackCount` and `ContainerProperties.ackTime` have init value.
* change `ListenerConsumer.offsets` type to Map<TopicPartition, Long>.
* replace `ListenerConsumer.setupSubBatchPerPartition` to `ContainerProperties.isSubBatchPerPartition`.
* add method `commitOffsets` and `commitOffsetsInTransactions`
* remove properties this.commitRecovered.
* refactor method `processCommits`.
* minor modification in `ackCurrent`
* remove the duplicate call to `updatePendingOffsets()` which is already handled in `processAcks()`

Author: Wzy19930507

spring-kafka/src/main/java/org/springframework/kafka/listener/ContainerProperties.java

@@ -783,7 +783,7 @@ public void setConsumerStartTimeout(Duration consumerStartTimeout) {
 	 * @since 2.3.2
 	 */
 	public boolean isSubBatchPerPartition() {
-		return this.subBatchPerPartition == null ? false : this.subBatchPerPartition;
+		return this.subBatchPerPartition != null && this.subBatchPerPartition;
 	}
 
 	/**

spring-kafka/src/main/java/org/springframework/kafka/listener/ErrorHandlingUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2023 the original author or authors.
+ * Copyright 2021-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,6 +49,8 @@
  * @author Gary Russell
  * @author Andrii Pelesh
  * @author Antonio Tomac
+ * @author Wang Zhiyang
+ *
  * @since 2.8
  *
  */
@@ -245,7 +247,7 @@ public static Exception findRootCause(Exception exception) {
 	 * @since 3.0.10
 	 */
 	public static <K, V> boolean checkDeserializer(ConsumerFactory<K, V> consumerFactory,
-			Properties consumerOverrides, boolean isValue, ClassLoader classLoader) {
+			Properties consumerOverrides, boolean isValue, @Nullable ClassLoader classLoader) {
 
 		Object deser = findDeserializerClass(consumerFactory, consumerOverrides, isValue);
 		Class<?> deserializer = null;