By Mohammad Yunus Yawar and Humeyra Pamuk KABUL/UNITED NATIONS (Reuters) – Afghanistan’s Taliban on Monday freed American engineer Mark Frerichs in exchange for Taliban-linked Afghan tribal leader Bashir Noorzai, after President Joe Biden granted clemency to the convicted drug smuggler who had been detained by the United States since 2005, officials said. Frerichs, an engineer abducted in 2020 while working in Afghanistan, was exchanged at Kabul airport for Noorzai, acting foreign minister Amir Khan Muttaqi told a news conference. Biden said Frerichs’ release was the culmination of work by U.S…