Test that new UI components are rendered when `new_project_creation_form` FF is enabled
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Work on this issue](https://contributors.gitlab.com/manage-issue?action=work&projectId=278964&issueIid=536048) - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=536048) </details> <!--IssueSummary end--> As noted in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/187947#note_2450335945, we should have a basic spec that tests if the new UI components are rendered when the `new_project_creation_form` FF is enabled. A good place to add this would be https://gitlab.com/gitlab-org/gitlab/-/blob/master/spec/features/projects/new_project_spec.rb
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