Regenerate cognitiveservices UserOwnedStorage receivers

The generator fix qualifies method receivers that collide with the arm/storage
conversion-package import aliases. UserOwnedStorage's last word is "Storage", so
its receiver changes from "storage" to "ownedStorage". Regenerated repo-wide;
this is the only existing type affected.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: andreidorin-oprea