[Reporting] Do not stretch report delete button (#171862)

## Summary

Closes https://github.com/elastic/kibana/issues/171853

Now there is no extra spacing around the button:

<img width="1469" alt="image"
src="c7cfe3fc-ed30-49ee-a9ce-e1234facb187">

---------

Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>

x-pack/plugins/reporting/public/management/report_listing_table.tsx

@@ -397,12 +397,12 @@ export class ReportListingTable extends Component<ListingPropsInternal, State> {
     return (
       <Fragment>
         {this.state.selectedJobs.length > 0 && (
-          <Fragment>
+          <div>
             <EuiFlexGroup alignItems="center" justifyContent="flexStart" gutterSize="m">
               <EuiFlexItem grow={false}>{this.renderDeleteButton()}</EuiFlexItem>
             </EuiFlexGroup>
             <EuiSpacer size="l" />
-          </Fragment>
+          </div>
         )}
         <EuiBasicTable
           tableCaption={i18n.translate('xpack.reporting.listing.table.captionDescription', {