test: tighten up two more cypress tests (#46273)

* test: tighten up user-token

This should be faster and a little more reliable.  before should have
worked, but beforeEach seems more reliable, so I'm trying it.

* test: use a single test for intro-page

Should be more robust as well as a lot faster.

client/src/components/settings/user-token.tsx

@@ -29,7 +29,7 @@ class UserToken extends Component<UserTokenProps> {
     const { t } = this.props;
 
     return (
-      <div className='user-token text-center'>
+      <div data-cy='user-token' className='user-token text-center'>
         <FullWidthRow>
           <Panel className='user-panel'>
             <Panel.Heading>{t('user-token.title')}</Panel.Heading>

client/src/templates/Challenges/codeally/show.tsx

@@ -236,6 +236,7 @@ class ShowCodeAlly extends Component<ShowCodeAllyProps> {
         <Helmet title={`${blockName}: ${title} | freeCodeCamp.org`} />
         <iframe
           className='codeally-frame'
+          data-cy='codeally-frame'
           // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
           sandbox='allow-modals allow-forms allow-popups allow-scripts allow-same-origin'
           src={`https://codeally.io/embed/?repoUrl=${url}&${goBackTo}&${envVariables}&${tempToken}&${date}`}