ocis: New option in storage users CLI

> Migrated from owncloud/docs-ocis#1308 — opened by @mmattel on 2026-08-06.
> Original: https://github.com/owncloud/docs-ocis/issues/1308

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References: https://github.com/owncloud/ocis/pull/12739 (fix(storage-users): add --orphaned upload session filter)

Added: `--orphaned`

Targeted for 8.3
