Fix querying and authentication for Zabbix v7.0+

[ivanahuckova]

Fixes #1914
Fixes #1929
Fixes #1917

1. In this PR, we are fixing authentication that is currently broken for Zabbix v7.2+ (in some cases also 7.0). The reason is that in 7.0 auth param was deprecated in favour of Auth header and in 7.2 the support was removed: https://www.zabbix.com/documentation/7.0/en/manual/api#authorization-methods

2. Moreover, the real_hosts was deprecated https://www.zabbix.com/documentation/7.0/en/manual/api/reference/hostgroup/get?hl=real_hosts in favor of with_hosts and support was removed in in 7.2.

3. And last select_acknowledges was deprecated and replaced with selectAcknowledges. https://www.zabbix.com/documentation/7.0/en/manual/api/reference/event/get?hl=select_acknowledges%2CselectAcknowledges

This PR fixes it and also adds a new docker block for Zabbix 72 for testing.

I have tested this PR with Zabbix 7.2:

zabbix72.mov

I have tested this PR with Zabbix 7.0:

zabbix70.mov

I have also tested with 6.2 and all works as expected.