Merge branch 'jwoodward-protected-ref-access-spec-improved-d3a42313' into 'master'

Add shared_context for protected ref access specs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/168687



Merged-by: Shinya Maeda <shinya@gitlab.com>
Approved-by: david hamp-gonsalves <dhamp-gonsalves@gitlab.com>
Approved-by: Shinya Maeda <shinya@gitlab.com>
Co-authored-by: Joe Woodward <j@joewoodward.me>