Increasing ack timeout to 4 hours for kds source (opensearch-project#6547)

Signed-off-by: Divyansh Bokadia <dbokadia@amazon.com>

Author: divbok

data-prepper-plugins/kinesis-source/src/main/java/org/opensearch/dataprepper/plugins/kinesis/source/processor/KinesisRecordProcessor.java

@@ -55,7 +55,7 @@ public class KinesisRecordProcessor implements ShardRecordProcessor {
     private static final Logger LOG = LoggerFactory.getLogger(KinesisRecordProcessor.class);
 
     private static final int DEFAULT_MONITOR_WAIT_TIME_MS = 15_000;
-    private static final Duration ACKNOWLEDGEMENT_SET_TIMEOUT = Duration.ofSeconds(20);
+    private static final Duration ACKNOWLEDGEMENT_SET_TIMEOUT = Duration.ofHours(4);
 
     private final StreamIdentifier streamIdentifier;
     private final KinesisStreamConfig kinesisStreamConfig;