[fix][dml] Also query workflow without tenant by given name (#13075)

before this, once remove user tenant, all users workflow
can not be found anymore, this patch fix this problem, make
this entrypoint can query workflow without tenant to its
users

dolphinscheduler-dao/src/main/resources/org/apache/dolphinscheduler/dao/mapper/ProcessDefinitionMapper.xml

@@ -62,8 +62,8 @@
         from t_ds_process_definition pd
         JOIN t_ds_user u ON pd.user_id = u.id
         JOIN  t_ds_project p ON pd.project_code = p.code
-        JOIN  t_ds_tenant t ON t.id = u.tenant_id
-        JOIN t_ds_queue q ON t.queue_id = q.id
+        LEFT JOIN  t_ds_tenant t ON t.id = u.tenant_id
+        LEFT JOIN t_ds_queue q ON t.queue_id = q.id
         WHERE p.code = #{projectCode}
         and pd.name = #{processDefinitionName}
     </select>