By Antonio Denti, Michael Martina and Andrea Shalal ROME/WASHINGTON (Reuters) -U.S. national security adviser Jake Sullivan on Monday raised concerns about China’s alignment with Russia in a seven-hour meeting with Chinese diplomat Yang Jiechi as Washington warned of the isolation and penalties Beijing will face if it helps Moscow in its invasion of Ukraine. The meeting took place in Rome as Washington told allies in NATO and several Asian countries that China had signaled its willingness to provide military and economic aid to Russia to support its war, two U.S. officials said. The U.S. messa…