Enable gitlab_pages to package-and-qa

What does this MR do and why?

Enable gitlab_pages to package-and-qa so we are able to run Pages E2E Tests against it.

Screenshots or screen recordings

These are strongly recommended to assist reviewers and reduce the time to merge your change.

How to set up and validate locally

bundle exec ./exe/gitlab-qa Test::Integration::GitlabPages EE --no-tests

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.