live: adding logging to notify that image file already exists

Just informational, provide a notice that the file already exists.

src/live/ogOperations.py

@@ -447,6 +447,9 @@ class OgLiveOperations:
                     logging.error('Cannot open /opt/opengnsys/images')
                     raise ValueError('Cannot access image folder')
 
+            if os.access(f'{image_path}', os.R_OK) == True:
+                    logging.info(f'image file {image_path} already exists, updating.')
+
             ogCopyEfiBootLoader(disk, partition)
             ogReduceFs(disk, partition)