Case C-34/21, Hauptpersonalrat der Lehrerinnen und Lehrer: Judgment of the Court (First Chamber) of 30 March 2023 (request for a preliminary ruling from the Verwaltungsgericht Wiesbaden — Germany) — Hauptpersonalrat der Lehrerinnen und Lehrer beim Hessischen Kultusministerium v Minister des Hessischen Kultusministeriums (Reference for a preliminary ruling — Protection of personal data — Regulation (EU) 2016/679 — Article 88(1) and (2) — Processing of data in the employment context — Regional school system — Teaching by videoconference as a result of the COVID-19 pandemic — Implementation without the express consent of the teachers)