ENGCOM-4838: Non existing file, when adding image to gallery with move option. Fix for #21978 #22020

 - Merge Pull Request #22020 from dudzio12/magento2:2.3-develop
 - Merged commits:
   1. 103c28b

Author: magento-engcom-team

app/code/Magento/Catalog/Model/Product/Gallery/Processor.php

@@ -196,7 +196,7 @@ public function addImage(
         $mediaGalleryData = $product->getData($attrCode);
         $position = 0;
 
-        $absoluteFilePath = $this->mediaDirectory->getAbsolutePath($file);
+        $absoluteFilePath = $this->mediaDirectory->getAbsolutePath($destinationFile);
         $imageMimeType = $this->mime->getMimeType($absoluteFilePath);
         $imageContent = $this->mediaDirectory->readFile($absoluteFilePath);
         $imageBase64 = base64_encode($imageContent);