chore(quality): add data-testid for the Launch standalone notebook se…

…rver button (#3294)

* red-hat-data-services/ods-ci#1880 (comment)

frontend/src/pages/projects/screens/projects/LaunchJupyterButton.tsx

@@ -17,6 +17,7 @@ const LaunchJupyterButton: React.FC = () => {
       content="Launch a notebook server to create a standalone notebook outside of a project."
     >
       <Button
+        data-testid="launch-standalone-notebook-server"
         href="/notebookController"
         component="a"
         variant={ButtonVariant.secondary}