feat: Add missing created_by field to ProjectMembers and GroupMembers

mentioned in commit 8d0df912

mentioned in merge request gitlab-org/cli!2389 (merged)

mentioned in merge request gitlab-org/release-tools!4472 (merged)

mentioned in merge request gitlab-com/gl-infra/woodhouse!681

mentioned in merge request gitlab-com/gl-infra/oncall-robot-assistant!104

mentioned in merge request fforster/gitlab-mcp!169 (merged)

mentioned in merge request schober-server/kubernetes/images/gitlab-token-refresher!35

mentioned in merge request gitlab-com/gl-infra/autolabels!98 (merged)

mentioned in merge request gitlab-com/gl-infra/ringctl!355 (merged)

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!1230 (merged)

mentioned in merge request fforster/epic-update!14 (merged)

mentioned in merge request sickit/token-operator!15 (merged)

mentioned in merge request ydkn/gitlab-runner-cleanup!42

mentioned in merge request gitlab-org/terraform-provider-gitlab!2677 (merged)

mentioned in merge request hojerdev/git-sync!64 (merged)

mentioned in merge request sue445/tanuki_reminder!262 (merged)

mentioned in merge request sue445/create-merge-request!149 (merged)

mentioned in merge request gitlab-org/container-registry!2558 (merged)