Add back private projects to Ci::Catalog::Listing

Private projects are currently being excluded when fetching
a users authorized projects. This MR will now include them.
There are a number of issues that will tackle performance concerns
when including private projects. These are currently being worked on
and will continue work in the upcoming milestones. For more information
please refer to the CI/CD Catalog epic:
https://gitlab.com/groups/gitlab-org/-/epics/11674

Changelog: changed