The owner of the Gazprom-controlled Nord Stream 2 gas pipeline is suing the European Union in the bloc's second-highest court, seeking to annul the EU's binding phase-out of gas imports from Russia, a public document showed.The EU approved a law this year to halt all Russian gas imports by late 2027, severing ties with Europe's former top supplier in response to Moscow's 2022 invasion of Ukraine.The ban blocked the prospect of reviving the Nord Stream system - two double pipelines under the Baltic Sea…