upgrade v4.2507.0 to v4.2508.0

[littleniannian]

不兼容的变更

https://github.com/actiontech/dms-ee/issues/597

版本升级方案

create table dms.system_variables like sqle.system_variables;
UPDATE sqle.system_variables SET value = REPLACE(value, '/sqle', '')
WHERE `key` = 'system_variable_sqle_url' AND RIGHT(value, LENGTH('/sqle')) = '/sqle';
insert into dms.system_variables
SELECT `key`,value from sqle.system_variables;