E2E test: fix create project web ui

What does this MR do and why?

Homepage no longer has a "new project" button

Resolves

• https://gitlab.com/gitlab-org/quality/test-failure-issues/-/issues/1789
• https://gitlab.com/gitlab-org/quality/test-failure-issues/-/issues/1790
• https://gitlab.com/gitlab-org/quality/test-failure-issues/-/issues/1788

Testing

https://gitlab.com/gitlab-org/gitlab/-/jobs/11691335876 <- job passing in this MR

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