Zabbix

........S. [ZBX-24993] removed reset of preprocessing history during configuration sync when preprocessing steps remain unchanged

Merge in ZBX/zabbix from feature/ZBX-24993-7.0 to release/7.0

* commit 'e6c2939000a360f23d7d69306d92aca77f2a2d4b':
  .......... [ZBX-24993] added changelog
  ........S. [ZBX-24993] fixed dc_preproc_item_changed to handle situation when preprocessing steps were removed
  ........S. [ZBX-24993] removed redundant assigment
  ........S. [ZBX-24993] fixed style
  ........S. [ZBX-24993] fixed various issues
  ........S. [ZBX-24993] added preprocitem revision update when removing step
  ........S. [ZBX-24993] added fixes
  ........S. [ZBX-24993] removed reset of preprocessing history during confsync when steps remain unchanged