Zabbix

A......... [ZBX-24543] removed restriction to remove a user group or removing a user from a user group when the user belongs to only one user group

Merge in ZBX/zabbix from feature/ZBX-24543-7.0 to release/7.0

* commit 'd24fdb172357c3cfdc22bf17e1cbea2ddb48c4a9':
  .......... [ZBX-24543] updated testFormUserGroups_Delete
  .......... [ZBX-24543] fixed grammatical errors
  .......... [ZBX-24543] added changelog
  A......... [ZBX-24543] removed restriction to delete group havnig user with single group; updated api tests
  A......... [ZBX-24543] removed check for single group user for usergroup.update; updated tests
  .......... [ZBX-24543] updated user.create and user.update tests to reflect validation for usrgrps and roleid; added gui_access to internal group users created for tests, tests data initilization can fail when default auth is changed to ldap