Added a function to use positionCameraToWorld for the player's position....

... Only works on the player since it uses camera position which is local to each machine.

Should entirely close https://github.com/michail-nikolaev/task-force-arma-3-radio/issues/487
TF_fnc_position isn't used globally in this particular case so for every other player it will produce defaultPositionCoordinates rather than this function.

Unfortunately that means the player that this is called on will be able to hear other players but the other players won't be able to hear him. Not without manual setting of position variables which this function uses and applies tf_fnc_position globally for the passed unit.