Nightvision - Move to new engine events

[LinkIsGrim]

Since 2.10 we've gotten OpticsModeChanged, OpticsSwitch, and VisionModeChanged in 2.08. We can use above to handle everything on the same frame instead of the next via CBA player event.

Relevant section:
https://github.com/acemod/ACE3/blob/master/addons/nightvision/XEH_postInit.sqf#L29-L34

Functions will need some touching up.

Will properly address #8249

[PabstMirror]

also possible to detect if weapon/scope is giving nvg - followup after #9421
but needed events like these

private _currentWeapon = currentWeapon ACE_player;
if ((cameraView == "GUNNER") && {_currentWeapon != ""} && {
    (_vehicle currentVisionMode _currentWeapon) params ["_weaponVisionMode"];
    _weaponVisionMode == 1 // weapon/scope is giving nvg
}) then {
    _config = configFile >> "CfgWeapons" >> _currentWeapon;
    private _weaponIndex = [ACE_player, _currentWeapon] call EFUNC(common,getWeaponIndex);
    private _scope = (switch _weaponIndex do {
        case 0: {primaryWeaponItems _unit};
        case 1: {secondaryWeaponItems _unit};
        case 2: {handgunItems _unit};
        default {[]};
    }) param [2, ""];
    private _scopeConfig = configFile >> "CfgWeapons" >> _scope;
    private _opticsModes = ("true" configClasses (_scopeConfig >> "ItemInfo" >> "OpticsModes"));
    {
        systemChat format ["%1 = %2", _x, getArray (_x >> "visionMode")];
        if (((getArray (_x >> "visionMode")) findIf {"nvg" == _x}) != -1) exitWith {
            _config = _scopeConfig;
        };
    } forEach _opticsModes;
};