Merge branch 'pedropombeiro/337838/1-add-ascendants-membership-enum-value' into 'master'

GraphQL: Add ALL_AVAILABLE membership value

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/96770



Merged-by: Alexandru Croitor <acroitor@gitlab.com>
Approved-by: Corinna Gogolok <cgogolok@gitlab.com>
Approved-by: Alexandru Croitor <acroitor@gitlab.com>
Approved-by: Dominic Couture <dcouture@gitlab.com>
Co-authored-by: Pedro Pombeiro <noreply@pedro.pombei.ro>