test(dashboard): update Header delete-button query for new accessible name

DeleteComponentButton now labels its IconButton 'Delete component', so the
role/name query for the old icon-derived name 'delete' no longer matches.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

superset-frontend/src/dashboard/components/DeleteComponentButton.tsx

@@ -18,6 +18,7 @@
  */
 import { MouseEventHandler, FC } from 'react';
 
+import { t } from '@apache-superset/core/translation';
 import { Icons } from '@superset-ui/core/components/Icons';
 import type { IconType } from '@superset-ui/core/components/Icons/types';
 import IconButton from './IconButton';
@@ -33,6 +34,7 @@ const DeleteComponentButton: FC<DeleteComponentButtonProps> = ({
 }) => (
   <IconButton
     onClick={onDelete}
+    label={t('Delete component')}
     icon={<Icons.DeleteOutlined iconSize={iconSize ?? 'l'} />}
   />
 );

superset-frontend/src/dashboard/components/IconButton.tsx

@@ -72,6 +72,7 @@ const IconButton = forwardRef<HTMLDivElement, IconButtonProps>(
       ref={ref}
       tabIndex={disabled ? -1 : 0}
       role="button"
+      aria-label={label}
       isDisabled={disabled}
       aria-disabled={disabled}
       data-test={dataTest}

superset-frontend/src/dashboard/components/gridComponents/Column/Column.tsx

@@ -247,6 +247,7 @@ const Column = (props: ColumnProps) => {
               />
               <IconButton
                 onClick={() => handleChangeFocus(true)}
+                label={t('Column settings')}
                 icon={<Icons.SettingOutlined iconSize="m" />}
               />
             </HoverMenu>

superset-frontend/src/dashboard/components/gridComponents/Header/Header.test.tsx

@@ -145,7 +145,9 @@ describe('Header', () => {
     const deleteComponent = jest.fn();
     setup({ editMode: true, deleteComponent });
 
-    const trashButton = screen.getByRole('button', { name: 'delete' });
+    const trashButton = screen.getByRole('button', {
+      name: 'Delete component',
+    });
     fireEvent.click(trashButton);
 
     expect(deleteComponent).toHaveBeenCalledTimes(1);

superset-frontend/src/dashboard/components/gridComponents/Row/Row.tsx

@@ -293,6 +293,7 @@ const Row = memo((props: RowProps) => {
             <DeleteComponentButton onDelete={handleDeleteComponent} />
             <IconButton
               onClick={() => handleChangeFocus(true)}
+              label={t('Row settings')}
               icon={<Icons.SettingOutlined iconSize="l" />}
             />
           </HoverMenu>