[Feature] Cleanup after upgrading from v1 to v2 #10573
Description
1Panel Version
2.0.11
Please describe your needs or suggestions for improvements
使用1panel-migrator升级后，v1 的旧数据库仍然会残留在/opt/1panel下，即使在快照迁移后依然会保留。
Please describe the solution you suggest
为1panel-migrator提供清理旧文件的功能。
Additional Information
1panel-migrator似乎不是开源的，请求开放它的源代码。