Zabbix

.......... [DEV-4711] added IWYU and cmocka fixes

Merge in ZBX/zabbix from feature/DEV-4711-7.0 to release/7.0

* commit '2641afa29011303832806c6d3a4c57be899ced0b':
  .......... [DEV-4711] updated fail_msg types
  .......... [DEV-4711] updated the logic of printing enum value
  .......... [DEV-4711] localized silencing of stringop-overflow= warning
  .......... [DEV-4711] updated fail_msg type
  .......... [DEV-4711] fixed one more warning
  .......... [DEV-4711] fixed cmocka warnings
  .......... [DEV-4711] fixed wrong compare guard
  .......... [DEV-4711] fixed backend-build warnings
  .......... [DEV-4711] added IWYU and cmocka fixes