Zabbix

.......PS. [DEV-3755] removed C pointer storage in custom javascript object property

Merge in ZBX/zabbix from feature/DEV-3755-6.5 to release/7.0

* commit '85f7f1bbb974bab931d512c1e65748d646775391':
  .......PS. [DEV-3755] fixed crash when using element without native data
  .......... [DEV-3755] added js security integration tests
  .......... [DEV-3755] added js security integration tests
  .......... [DEV-3755] added js security integration tests
  .......... [DEV-3755] added js security tests
  .......PS. [DEV-3755] fixed memory leak when destroying js environment with global variables linked to C structures
  .......PS. [DEV-3755] reworked native object attachment to js objects
  .......PS. [DEV-3755] reworked native object attachment to js objects
  .......PS. [DEV-3755] replaced js object mapping by hardcoded property with mapping by object heap pointer
  .......PS. [DEV-3755] added protection to prevent embeded browser data from being accessed directly by script
  .......PS. [DEV-3755] fixed memory leak when embedded native object retrieval failed in method accepting parameters
  .......PS. [DEV-3755] removed CurlHttpObject from http object instance checks
  .......PS. [DEV-3755] removed direct pointer access in custom javascript objects, added instanceof checks when accessing embedded C pointers from custom js objects