AC-7422:Incompatible issues fix for PHP8.2

Author: glo17680

app/code/Magento/CatalogSampleData/Model/Product/Gallery.php

@@ -51,6 +51,11 @@ class Gallery
      */
     private $metadataPool;
 
+    /**
+     * @var GalleryResource
+     */
+    protected $galleryResource;
+
     /**
      * @param SampleDataContext $sampleDataContext
      * @param ProductFactory $productFactory

app/code/Magento/CmsSampleData/Model/Block/Converter.php

@@ -45,6 +45,11 @@ class Converter
      */
     protected $productCollectionFactory;
 
+    /**
+     * @var \Magento\Eav\Model\Config
+     */
+    protected $eavConfig;
+
     /**
      * @param \Magento\Catalog\Model\ResourceModel\Category\CollectionFactory $categoryFactory
      * @param \Magento\Eav\Model\Config $eavConfig