Handling Close call in ICR mode

[kumarpritam863]

kafka-connect-storage-cloud/kafka-connect-s3/src/main/java/io/confluent/connect/s3/S3SinkTask.java

Line 324 in daf614b

topicPartitionWriters.clear();

The close is not handling the ICR mode of rebalancing. In ICR mode the close is called partially for some partitions and does not mean that always all the partitions will get revoked. Are we making any change to handle this scenario.