[FLINK-38197][cdc-common] Fix Data Errors Caused by Default Added Columns at End Position

Author: 王俊博(wangjunbo)

flink-cdc-runtime/src/main/java/org/apache/flink/cdc/runtime/operators/schema/common/SchemaDerivator.java

@@ -290,7 +290,9 @@ private static Stream<SchemaChangeEvent> lenientizeAddColumnEvent(
                                                                         .nullable(),
                                                                 col.getAddColumn().getComment(),
                                                                 col.getAddColumn()
-                                                                        .getDefaultValueExpression())))
+                                                                        .getDefaultValueExpression()),
+                                                        col.getPosition(),
+                                                        col.getExistedColumnName()))
                                 .collect(Collectors.toList())));
     }