security/gvm: update to 21.4.2

The following ports part of security gvm were updated

security/gvmd: Update to 21.4.3
security/gvm-libs: Update to 21.4.2
security/openvas: Update to 21.4.2
security/py-ospd-openvas: Update to 21.4.2
security/py-ospd: Update to 21.4.3
security/greenbone-security-assistant: Update to 21.4.2

• Fix build on FreeBSD 11 [1]

PR: 257653
Reported by: John Hein <jcfyecrayz _ at _ liamekaens.com> [1]