MINOR: Fix ProducerPerformance bug when numRecords > Integer.MAX (apa…

…che#5956)

Current code will fall into non-stop loop and send more message to broker, and Stat in PerfCallback method record will throw ArrayIndexOutOfBoundsException

tools/src/main/java/org/apache/kafka/tools/ProducerPerformance.java

@@ -126,7 +126,7 @@ public static void main(String[] args) throws Exception {
 
             int currentTransactionSize = 0;
             long transactionStartTime = 0;
-            for (int i = 0; i < numRecords; i++) {
+            for (long i = 0; i < numRecords; i++) {
                 if (transactionsEnabled && currentTransactionSize == 0) {
                     producer.beginTransaction();
                     transactionStartTime = System.currentTimeMillis();