Merge pull request #152 from SunriseOpenOperatorPlatform/feature/add-edgecloud-gsma-i2edge

Minor updates related to app and app instances operations

- Removes federation_context_id and idempotency_key parameters from GSMA methods
- Corrects expected HTTP status code from 200 to 204 for deletion operations
- Updates schema class from ZoneInfo to ZoneInfoRef