fix reloadGrid return type

Author: Nazar65

AdobeStockImageAdminUi/Test/Mftf/ActionGroup/AdminAdobeStockMediaGallerySearchByKeywordActionGroup.xml

@@ -13,7 +13,7 @@
             <description>Fills 'Search by keyword' on media galllery grid page page. Clicks on Submit Search.</description>
         </annotations>
         <arguments>
-            <argument name="keyword"/>
+            <argument name="keyword" type="string"/>
         </arguments>
 
         <conditionalClick selector="{{AdminEnhancedMediaGalleryActionsSection.clearFilters}}" dependentSelector="{{AdminEnhancedMediaGalleryActionsSection.clearFilters}}" visible="true" stepKey="clearExistingOrderFilters"/>

AdobeStockImageAdminUi/view/adminhtml/web/js/components/grid/column/preview/actions.js

@@ -336,9 +336,8 @@ define([
             provider = uiRegistry.get('index = media_gallery_listing_data_source'),
                 dataStorage = provider.storage();
 
-            // this.subscriptionOnImageItems();
             dataStorage.clearRequests();
-            provider.reload();
+            return provider.reload();
         },
 
         /**