Merge pull request #8579 from magento-gl/AC-9628

AC-9628::Fatal when trying to open a category page in the admin - Fetched table name from Resource class

Author: sidolov

app/code/Magento/Catalog/Model/ResourceModel/Category/Collection.php

@@ -568,8 +568,7 @@ private function getProductsCountFromCategoryTable(Category $item, string $websi
      */
     private function getProductsCountQuery(array $categoryIds, $addVisibilityFilter = true): Select
     {
-        $connections = $this->_resource->getConnection();
-        $categoryTable = $connections->getTableName('catalog_category_product_index');
+        $categoryTable = $this->_resource->getTableName('catalog_category_product_index');
         $select = $this->_conn->select()
             ->from(
                 ['cat_index' => $categoryTable],