ENH: Fix memory leak associated with ImageReader2Factory usage

src/Cxx/IO/ImageReader2Factory.cxx

src/Cxx/ImageData/ImageDataToPointSet.cxx

src/Cxx/Images/BackgroundImage.cxx

src/Cxx/Images/CenterAnImage.cxx

src/Cxx/Images/Colored2DImageFusion.cxx

src/Cxx/Images/CombineImages.cxx

src/Cxx/Images/DrawOnAnImage.cxx

src/Cxx/Images/ExtractComponents.cxx

src/Cxx/Images/Gradient.cxx

src/Cxx/Images/ImageAccumulateGreyscale.cxx

src/Cxx/Images/ImageAnisotropicDiffusion2D.cxx

src/Cxx/Images/ImageCheckerboard.cxx

src/Cxx/Images/ImageCityBlockDistance.cxx

src/Cxx/Images/ImageHistogram.cxx

src/Cxx/Images/ImageRange3D.cxx

src/Cxx/Images/InteractWithImage.cxx

src/Cxx/Images/PickPixel.cxx

src/Cxx/Images/RGBToHSI.cxx

src/Cxx/Images/RGBToHSV.cxx

src/Cxx/Images/RGBToYIQ.cxx