[smooth, raster] Limit bitmap size (#54019). * src/raster/ftraster.c [STANDALONE] (FT_Outline_Get_CBox): Add function. [!STANDALONE]: Include FT_OUTLINE_H. (ft_black_render): Compute CBox and reject glyphs larger than 0xFFFF x 0xFFFF. * src/smooth/ftgrays.c (gray_raster_render): Reject glyphs larger than 0xFFFF x 0xFFFF.