[QA] Fix the Codeowners QA test

What does this MR do?

We need to explicitly visit the project page after adding the project members because pushing a commit doesn't go the project page to get the clone URL since it's retrieved from the API response of the project's creation request.

Also, I removed the wait_for_push since all it did was sleeping 5 seconds and refreshing the current page (which was the project's members page).

What are the relevant issue numbers?

Fixes https://gitlab.com/gitlab-org/quality/nightly/issues/46.

Does this MR meet the acceptance criteria?

• [-] Changelog entry added, if necessary
• [-] Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• [-] Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• EE specific content should be in the top level /ee folder
• For a paid feature, have we considered GitLab.com plans, how it works for groups, and is there a design for promoting it to users who aren't on the correct plan?
• Security reports checked/validated by reviewer