Zabbix

.......P.. [ZBX-25664] fixed nested transactions on Zabbix proxy when using hybrid buffer

Merge in ZBX/zabbix from feature/ZBX-25664-7.0 to release/7.0

* commit '854ecda12631c4860a9981052a542a01c687a912':
  .......... [ZBX-25664] added changelog
  .......... [ZBX-25664] added changelog
  .......P.. [ZBX-25664] moved zbx_pb_update_state and reverted transaction changes
  .......PS. [ZBX-25664] fixed nested transactions on Zabbix proxy when using hybrid buffer