Zabbix

A.F....... [ZBX-24750] fixed issues with maximum field length for map elements and shapes

* commit '53e694830ee246a7dc16ce1e03dceee72d85a5f2':
  A......... [ZBX-24750] added few API tests
  .......... [ZBX-24750] updated changelog
  ..F....... [ZBX-24750] limited the maximum length of map shape text fields
  A.F....... [ZBX-24750] restricted the maximum length of map link label values
  ..F....... [ZBX-24750] fixed the maximum length of map label values in mass element update form
  A.F....... [ZBX-24570] restricted the maximum length of map label values, removed unused code