Allow ConveyorBasicBlock to turn

[CoolandonRS]

Allow ConveyorBasicBlock tiles to dynamically turn under several cases (mostly following what RailBlock does) without manual blockstate changes (IE debug stick). This turning should run in a function called in getStateForNeighborUpdate before the present code using testConveyorConnect (so testConveyorConnect runs on the newly turned conveyor instead of the one that was placed by default).

Possibly integrate with getPlacementState however that is much lower priority.