ACP2E-3236: addressed PR comments, reverted en_US.csv collect-phrases, added missing phrase manually

Author: alzota

app/code/Magento/Catalog/Test/Unit/Model/ProductRepositoryTest.php

@@ -1574,7 +1574,7 @@ public function testSaveExistingWithMediaGalleryEntries(): void
      */
     public function testSaveCouldNotSaveException(): void
     {
-        $this->expectException('Magento\Framework\Exception\CouldNotSaveException');
+        $this->expectException(\Magento\Framework\Exception\CouldNotSaveException::class);
         $productData = [
             'name' => 'Simple Product',
             'price' => 100