CL2 format only supports line overrun for Transparent commands

[glebm]

In CL2, pixel and fill runs cannot go beyond the end of the line. Only transparent runs can cross line boundaries.

The render simply does not support this for pixel and fill runs https://github.com/diasurgical/devilution/blob/f1b85a5cd3751363d248f7a2a460d527f69c2a32/Source/engine.cpp#L2834-L2838