Zabbix

........S. [ZBX-27524] fixed 'multiply by' preprocessing testing with JSON value type, fixed tag generation by webhooks

Merge in ZBX/zabbix from feature/ZBX-27524-7.5 to master

* commit '50b54dd198cb2576887a5f9bc63eacef56516543':
  .D........ [ZBX-27524] added changelog entry
  .......... [ZBX-27524] reverted last commit
  .......PS. [ZBX-27524] improved json value type value validation
  ........S. [ZBX-27524] prevented json type items from being cached
  ........S. [ZBX-27524] fixed items with unsupported value types being added to value cache
  .......P.. [ZBX-27524] increased JSON value type max length to 128MB
  .......PS. [ZBX-27524] fixed uint64 hash function and alertpoolid calculation
  ........S. [ZBX-27524] fixed alert pool id calculation
  ........S. [ZBX-27524] unified json value type handling in valuecache
  .......PS. [ZBX-27524] fixed json validation error being overwritten
  ........S. [ZBX-27524] fixed testing of single 'multiply by' preprocessing step with json value type items
  ........S. [ZBX-27524] removed json variant