Merge branch 'selhorn-move-graphql-ex' into 'master'

Moving graphql page to correct location

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/170980



Merged-by: Evan Read <eread@gitlab.com>
Approved-by: Evan Read <eread@gitlab.com>
Co-authored-by: Suzanne Selhorn <sselhorn@gitlab.com>