Enhancement: Support Skyhigh Security ICAP as an ICAP server

We have upgraded the antivirus ICAP client library, bringing enhanced performance and reliability to our antivirus scanning service.
With this update, the Skyhigh Security ICAP can now be used as an ICAP server, providing robust and scalable antivirus solutions.

https://github.com/owncloud/ocis/issues/9720
https://github.com/fschade/icap-client/pull/6
