Remove external/popout icon from Create Engine CTA (#92272) (#92407)

- now that create engine is no longer linking out to standalone UI

Co-authored-by: Constance <constancecchen@users.noreply.github.com>

Author: kibanamachine

x-pack/plugins/enterprise_search/public/applications/app_search/components/engines/components/empty_state.tsx

@@ -52,7 +52,6 @@ export const EmptyState: React.FC = () => {
           actions={
             <EuiButtonTo
               data-test-subj="EmptyStateCreateFirstEngineCta"
-              iconType="popout"
               fill
               to={ENGINE_CREATION_PATH}
               onClick={() =>