Add Zabbix 5.4+ compatibility

[pdecat]

This PR adds compatibility for Zabbix 5.4 and later versions.

TODO:

• Disable Applications API tests for Zabbix 5.4+ which dropped support of whole Application API.
• Fix Unable to destroy host terraform-provider-zabbix#34 :

• Reverse the calls to host.delete API to favor newer versions of Zabbix Server that don't use hostid in params.
• See Fix HostsDeleteByIds request due to documentation #11 (comment)

• Fix trigger_test.go:18: -32602 (Invalid params.): Invalid parameter "/1/expression": incorrect expression starting from "{fv-az241-50-testing-8453496418047518088:key.lala.laa.last()}=0". with trigger.create invocation and Zabbix 5.4+
• Fix template_test.go:16: -32602 (Invalid params.): Invalid parameter "/1/macros": an array is expected. with template.create invocation and Zabbix 5.4
• Fix template_test.go:16: -32602 (Invalid params.): Invalid parameter "/1/groups/1": unexpected parameter "name". with template.create invocation and Zabbix 6.0+
• Fix template_test.go:20: -32500 (Application error.): No permissions to referred object or it does not exist! with template.create invocation and Zabbix 6.2