Case C-833/21, Endesa Generación: Judgment of the Court (Fifth Chamber) of 22 June 2023 (request for a preliminary ruling from the Audiencia Nacional — Spain) — Endesa Generación SAU v Tribunal Económico Administrativo Central (Reference for a preliminary ruling — Taxation of energy products and electricity — Directive 2003/96/EC — Article 14(1)(a) — Exemption of energy products used to produce electricity — Derogation — Taxation of energy products for ‘reasons of environmental policy’ — Scope)