Case C-466/21 P: Judgment of the Court (Fourth Chamber) of 14 September 2023 — Land Rheinland-Pfalz v Deutsche Lufthansa AG, European Commission, Federal Republic of Germany (Appeal — State aid — Aviation sector — Operational aid granted by the Federal Republic of Germany to Frankfurt-Hahn airport — Article 108 TFEU — Decision not to open the formal investigation procedure — Action for annulment — Status as an interested party