clamav: Fix of 2 CVEs

Update to 0.103.11 - CVE-2023-20032: fix missing buffer size check that may result in a heap buffer overflow write - Don't apply clamav-check.patch and CVE-2022-20698.patch as they have already been applied in new 0.103.11 version - Don't apply clamav-clamonacc-service.patch since el6 doesn't...