fix: update BUCKET_KEY_PREFIX to use origin_asset_path for correct image reference
This ensures that the module follows the expected behavior outlined for the image module https://nextjs.org/docs/api-reference/next.config.js/basepath#images (This may be a breaking change for some use cases however, it now follows the expected next.js behavior)
Full Changelog: v3.4.1...v3.4.2