Renamed files (#3308)

Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

torchvision/csrc/io/image/cpu/read_image_cpu.cpp → torchvision/csrc/io/image/cpu/read_image_impl.cpp

-#include "read_image_cpu.h"
+#include "read_image_impl.h"
 
-#include "readjpeg_cpu.h"
-#include "readpng_cpu.h"
+#include "readjpeg_impl.h"
+#include "readpng_impl.h"
 
 torch::Tensor decode_image(const torch::Tensor& data, ImageReadMode mode) {
   // Check that the input tensor dtype is uint8

torchvision/csrc/io/image/cpu/read_write_file_cpu.cpp → torchvision/csrc/io/image/cpu/read_write_file_impl.cpp

-#include "read_write_file_cpu.h"
+#include "read_write_file_impl.h"
 
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN

torchvision/csrc/io/image/cpu/readjpeg_cpu.cpp → torchvision/csrc/io/image/cpu/readjpeg_impl.cpp

-#include "readjpeg_cpu.h"
+#include "readjpeg_impl.h"
 
 #if !JPEG_FOUND
 torch::Tensor decodeJPEG(const torch::Tensor& data, ImageReadMode mode) {

torchvision/csrc/io/image/cpu/readpng_cpu.cpp → torchvision/csrc/io/image/cpu/readpng_impl.cpp

-#include "readpng_cpu.h"
+#include "readpng_impl.h"
 
 #if !PNG_FOUND
 torch::Tensor decodePNG(const torch::Tensor& data, ImageReadMode mode) {

torchvision/csrc/io/image/cpu/writejpeg_cpu.cpp → torchvision/csrc/io/image/cpu/writejpeg_impl.cpp

-#include "writejpeg_cpu.h"
+#include "writejpeg_impl.h"
 
 #if !JPEG_FOUND
 

torchvision/csrc/io/image/cpu/writepng_cpu.cpp → torchvision/csrc/io/image/cpu/writepng_impl.cpp

-#include "writejpeg_cpu.h"
+#include "writejpeg_impl.h"
 
 #if !PNG_FOUND
 

torchvision/csrc/io/image/image.h

 #pragma once
 
-#include "cpu/read_image_cpu.h"
-#include "cpu/read_write_file_cpu.h"
-#include "cpu/readjpeg_cpu.h"
-#include "cpu/readpng_cpu.h"
-#include "cpu/writejpeg_cpu.h"
-#include "cpu/writepng_cpu.h"
+#include "cpu/read_image_impl.h"
+#include "cpu/read_write_file_impl.h"
+#include "cpu/readjpeg_impl.h"
+#include "cpu/readpng_impl.h"
+#include "cpu/writejpeg_impl.h"
+#include "cpu/writepng_impl.h"