Add Disassembled XEH support

[veteran29]

When merged this pull request will:

• Add XEH support for new Disassembled EH - https://community.bistudio.com/wiki/Arma_3:_Event_Handlers#Disassembled

Tested:

["AllVehicles", "Disassembled", {hint str _this}, true] call CBA_fnc_addClassEventHandler;

class Extended_Disassembled_EventHandlers {
    class AllVehicles {
        class My_test_eh {
            disassembled = "hint str _this";
        };
    };
};

[PabstMirror]

tested working