By Kate Abnett and John Chalmers BRUSSELS (Reuters) -Several countries aired frustration on Thursday with Germany’s refusal to cap gas prices as European Union leaders looked set to end yet another debate on the bloc’s response to the energy crunch without agreement on the issue. The EU is grappling with high energy prices driving inflation and raising the prospect of recession across the continent, a situation aggravated by Russia cutting gas flows following its February invasion of Ukraine. The 27 countries have already agreed to fill gas storages and claw back revenues from energy firms to …