Case C-457/21 P: Judgment of the Court (Second Chamber) of 14 December 2023 — European Commission v Grand Duchy of Luxembourg, Amazon.com Inc., Amazon EU Sàrl, Ireland (Appeal — State aid — Article 107(1) TFEU — Tax ruling adopted by a Member State — Aid declared incompatible with the internal market — Concept of ‘advantage’ — Determination of the reference framework — ‘Normal’ taxation according to national law — Arm’s length principle — Review by the Court of Justice of interpretation and application of national law by the General Court)