fix(测试跟踪): 测试计划发送通知时支持发送给创建人

https://www.tapd.cn/55049933/bugtrace/bugs/view?bug_id=1155049933001016881

backend/src/main/java/io/metersphere/track/service/TestPlanMessageService.java

@@ -152,6 +152,7 @@ public class TestPlanMessageService {
         paramMap.put("type", "testPlan");
         paramMap.put("url", url);
         paramMap.put("projectId", projectId);
+        paramMap.put("creator", testPlan.getCreator());
         if (userDTO != null) {
             paramMap.put("operator", userDTO.getName());
             paramMap.put("executor", userDTO.getId());