Fix refactor/s3024 stringbuilder append (#17234)

* refactor: use multiple append calls instead of string concatenation

* refactor: use multiple append calls instead of string concatenation

Author: anukalp2804

example/session/src/main/java/org/apache/iotdb/SessionPoolExample.java

@@ -115,7 +115,7 @@ private static void queryByIterator() {
               while (dataIterator.next()) {
                 StringBuilder builder = new StringBuilder();
                 for (String columnName : wrapper.getColumnNames()) {
-                  builder.append(dataIterator.getString(columnName) + " ");
+                  builder.append(dataIterator.getString(columnName)).append(" ");
                 }
                 System.out.println(builder);
               }