feat(api): add api support for delete enterprise user

mentioned in commit ae40a60d

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

mentioned in merge request gitlab-org/release-tools!4513 (merged)

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

mentioned in merge request sue445/create-merge-request!152 (merged)

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

mentioned in merge request fforster/epic-update!24 (merged)

mentioned in merge request fforster/gitlab-mcp!178 (merged)

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

mentioned in merge request gitlab-com/gl-infra/autolabels!108 (merged)

mentioned in merge request gitlab-com/gl-infra/ringctl!369 (merged)

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!1258 (merged)

mentioned in merge request sickit/token-operator!17

mentioned in merge request gitlab-org/cli!2444 (merged)

mentioned in merge request gitlab-org/terraform-provider-gitlab!2725 (merged)

mentioned in merge request gitlab-org/cli!2445 (closed)

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