Case T-377/20: Judgment of the General Court of 1 September 2021 — KN v EESC (Law governing the institutions — Member of the EESC — OLAF investigation into allegations of psychological harassment — Decision to discharge a member from his or her supervisory and personnel management activities — Action for annulment — Challengeable act — Admissibility — Measure taken in the interest of the service — Legal basis — Rights of the defence — Refusal to grant access to the annnexes to the OLAF report — Disclosure of the substance of the witness statements in the form of a summary — Liability)