By Kate Abnett and Simon Jessop BRUSSELS (Reuters) – At least two groups of European Union lawmakers have confirmed they will reject an EU proposal to label gas and nuclear energy as sustainable investments, officials said on Wednesday. The European Commission last month proposed including both in the EU’s sustainable finance taxonomy, a system for labelling climate-friendly investments. The proposal split opinion among the European Parliament and EU countries, which disagree on the fuels’ green credentials and could also still reject it. Two groups of lawmakers – the Greens and the Socialists…