[fix](nereids)should set isForwardedToMaster and redirectStatus to null before fallback to legacy planner (#44332)

pick from master https://github.com/apache/doris/pull/44163

fe/fe-core/src/main/java/org/apache/doris/qe/StmtExecutor.java

@@ -597,6 +597,8 @@ public class StmtExecutor {
                     }
                     parsedStmt = null;
                     planner = null;
+                    isForwardedToMaster = null;
+                    redirectStatus = null;
                     // Attention: currently exception from nereids does not mean an Exception to user terminal
                     // unless user does not allow fallback to lagency planner. But state of query
                     // has already been set to Error in this case, it will have some side effect on profile result