[Bug] [API] The workflow definition and the tenant in the workflow instance are inconsistent. (#12533)

* [Bug] [API] The workflow definition and the tenant in the workflow instance are inconsistent

* fix  NPE.

Co-authored-by: houshitao <shitaohou@163.com>

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

@@ -250,6 +250,10 @@ public class ProcessInstanceServiceImpl extends BaseServiceImpl implements Proce
             logger.error("Process definition does not exist, projectCode:{}.", projectCode);
             putMsg(result, Status.PROCESS_DEFINE_NOT_EXIST, processId);
         } else {
+            Tenant tenant = tenantMapper.queryById(processDefinition.getTenantId());
+            if (tenant != null) {
+                processDefinition.setTenantCode(tenant.getTenantCode());
+            }
             processInstance.setLocations(processDefinition.getLocations());
             processInstance.setDagData(processService.genDagData(processDefinition));
             result.put(DATA_LIST, processInstance);