Opinion of the European Economic and Social Committee on the Proposal for a Regulation of the European Parliament and of the Council amending Regulation (EU) 2015/760 as regards the scope of eligible assets and investments, the portfolio composition and diversification requirements, the borrowing of cash and other fund rules and as regards requirements pertaining to the authorisation, investment policies and operating conditions of European long-term investment funds (COM(2021) 722 final — 2021/0377 (COD))