[Improvement][API][num-5] The workflow of the main table version is not allowed to be deleted (#6893)

* feature:deleteProcessDefinitionVersion

* pref:delete duplicate enum definition

Co-authored-by: 北笙 <“zhanqian@cai-inc.com”>

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessDefinitionServiceImpl.java

@@ -1509,6 +1509,10 @@ public class ProcessDefinitionServiceImpl extends BaseServiceImpl implements Pro
         if (processDefinition == null) {
             putMsg(result, Status.PROCESS_DEFINE_NOT_EXIST, code);
         } else {
+            if (processDefinition.getVersion() == version) {
+                putMsg(result, Status.MAIN_TABLE_USING_VERSION);
+                return result;
+            }
             int deleteLog = processDefinitionLogMapper.deleteByProcessDefinitionCodeAndVersion(code, version);
             int deleteRelationLog = processTaskRelationLogMapper.deleteByCode(processDefinition.getCode(), processDefinition.getVersion());
             if (deleteLog == 0 || deleteRelationLog == 0) {