Describe the bug

Currently, the Iceberg REST server is not spec compliant for errors (non 2xx errors) since error responses need to have specific fields https://github.com/apache/iceberg/blob/main/open-api/rest-catalog-open-api.yaml#L3197.
Any failures in the Iceberg REST Server should surface a message, type, code in the response. https://github.com/apache/iceberg/blob/main/open-api/rest-catalog-open-api.yaml#L1529

Currently, GlobalExceptionHandler will publish other fields so we may want something different for the Iceberg REST Server.