Zabbix

A......... [ZBX-24690] fixed yaml generation in compact nested mapping mode; applied cerry-pick c9ddba09eb4

Merge in ZBX/zabbix from feature/ZBX-24690-6.0 to release/6.0

* commit '2b31a226198081fa1569ef4722ac4680aaa53b64':
  A......... [ZBX-24690] replaced regex with flag Yaml::DUMP_COMPACT_NESTED_MAPPING usage; updated test case
  .......... [ZBX-24690] applied changes from https://github.com/symfony/symfony/commit/f67e6366100482bd068b26fd34f8ea1219c2f0c0
  .......... [ZBX-24690] added test for case when compact nested mapping is applied to multiline string because no context is available in regex
  .......... [ZBX-24690] fixed autoload.php path for unit tests bootstrap file
  .......... [ZBX-24690] moved yaml test to unit tests
  .......... [ZBX-24690] fixed incorrect match when multiple lines are taken as $0; fixed incorrect match when line with dash follows by another line with dash
  A......... [ZBX-24690] fixed incorrect regex when empty line were taken in to account; added test
  A......... [ZBX-24690] fixed yaml generation in compact nested mapping mode

(cherry picked from commit c9ddba09eb4d7bfa3a54ed07fc262f8f89583073)