By Kate Abnett and Sabine Siebold BRUSSELS (Reuters) -European Union leaders ended another debate on the bloc’s response to the energy crunch without agreement on whether to cap gas prices, deciding in the early hours of Friday morning to keep examining options to put a ceiling on costs. The EU is grappling with high energy prices driving inflation and raising the prospect of recession across the continent, a situation aggravated by Russia slashing gas flows following its February invasion of Ukraine. The 27 countries have already agreed to fill gas storages and claw back revenues from energy …