Add: Unsheduled to deactivate city

[Vdauphin]

• Add: Unsheduled to deactivate city (@Vdauphin).

[] spawn {
 for "_i" from 1 to 10 do {
  [str(_i)] remoteExec ["systemchat"];
  [102] call btc_fnc_city_activate;

  ["desactive"] remoteExec ["systemchat"];

  [102] call btc_fnc_city_de_activate;
  sleep 1;
 };
};

When merged this pull request will:

• This is a workaround to FIX dedicated server crash when CBA is deleting group until this is published FIX: CBA_fnc_deleteEntity looping over network and kill dedicated server CBATeam/CBA_A3#940
• Also use unsheduled to deactivate city

Final test:

• local
• server