feat(admin): add MinIO-compatible IAM/IDP admin endpoints
Register and implement MinIO admin API compatibility for IAM/IDP:
- PUT /v3/import-iam-v2 and POST /v3/revoke-tokens/{userProvider}
- generic /v3/idp-config/{type}[/{name}] CRUD mapped onto existing config
- LDAP/OpenID service-account, policy-entities, and list-access-keys flows
Adds IamSys::delete_temp_account primitive to back STS token revocation.
revoke-tokens requires the broader ListUsers admin capability for
cross-user revocation (self-revocation only needs RemoveServiceAccount),
mirroring the cross-user guard used by the service-account handlers.
Registers admin route-policy inventory entries for every new route.
Unsupported LDAP/OpenID backends return honest compatibility errors.
Refs rustfs/backlog#609 #610#616
Zhengchao An
8f11222a63