Zabbix

.......PS. [ZBX-22130] changed jsonpath expression evaluator to treat null values as empty variants (wiper)

Merge in ZBX/zabbix from feature/ZBX-22130-6.0 to release/6.0

* commit 'cf4921450afdef99fd321096717bfc31507d78f7':
  .......... [ZBX-22130] added test case for null comparison in jsonpath query
  .D........ [ZBX-22130] added changelog entry
  .......PS. [ZBX-22130] changed jsonpath expression evaluator to treat null values as empty variants