Security update for libvirt

This update for libvirt fixes the following issues: CVE-2026-18917: remote: Fix integer overflow in RPC handler for virNodeGetFreePages bsc1275863 CVE-2026-63622: util: virFileChownFiles: do not follow symlinks bsc1275264 CVE-2026-63623: storage: create images with a private umask during qemu-img...