`DngOpcodes::PixelOpcode::applyOP()`: port to `CroppedArray2DRef`
`DngOpcodes::PixelOpcode::applyOP()`: port to `CroppedArray2DRef`

LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed