fix: return detailed API errors for BlockUser instead of generic LDAP message

mentioned in commit b73434f5

mentioned in merge request gitlab-org/cli!2580

mentioned in merge request gitlab-org/release-tools!4632 (merged)

mentioned in merge request gitlab-org/cli!2600

mentioned in merge request gitlab-com/gl-infra/woodhouse!734

mentioned in merge request gitlab-com/gl-infra/woodhouse!738

mentioned in merge request gitlab-com/gl-infra/autolabels!136 (merged)

mentioned in merge request gitlab-com/gl-infra/autolabels!137

mentioned in merge request gitlab-org/terraform-provider-gitlab!2789

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!1411 (merged)

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!1412

mentioned in merge request hojerdev/git-sync!72

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

mentioned in merge request gitlab-com/gl-infra/oncall-robot-assistant!110

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

mentioned in merge request schober-server/kubernetes/images/gitlab-token-refresher!37

mentioned in merge request fforster/epic-update!43 (merged)

mentioned in merge request fforster/epic-update!44

mentioned in merge request sickit/token-operator!30

mentioned in merge request sickit/token-operator!35