zabbix_agentd: Update to 7.0.11 (LTS)

zabbix_agentd: Update to 7.0.11 (LTS)

- Update from version 6.0.33 to 7.0.11
- Update of rootfile not required

This is a major release update to the next LTS version and breaks compatibility with Zabbix Server 6.x.
A survey on the forum resulted in nobody claiming to still use Zabbix Server v6.x.

Full changelogs:
- https://www.zabbix.com/rn/rn7.0.0
- https://www.zabbix.com/rn/rn7.0.1
- https://www.zabbix.com/rn/rn7.0.2
- https://www.zabbix.com/rn/rn7.0.3
- https://www.zabbix.com/rn/rn7.0.4
- https://www.zabbix.com/rn/rn7.0.5
- https://www.zabbix.com/rn/rn7.0.6
- https://www.zabbix.com/rn/rn7.0.7
- https://www.zabbix.com/rn/rn7.0.8
- https://www.zabbix.com/rn/rn7.0.9
- https://www.zabbix.com/rn/rn7.0.10
- https://www.zabbix.com/rn/rn7.0.11

Signed-off-by: Robin Roevens <robin.roevens@disroot.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>