By Michelle Nichols BUCHAREST (Reuters) -The United States will ask the U.N. General Assembly to suspend Russia from the Human Rights Council, the U.S. ambassador to the United Nations said on Monday, after Ukraine accused Russian troops of killing dozens of civilians in the town of Bucha. A two-thirds majority vote by the 193-member assembly in New York can suspend a state for persistently committing gross and systematic violations of human rights. “Russia’s participation on the Human Rights Council is a farce,” U.S. Ambassador Linda Thomas-Greenfield said on a visit to Romania. “And it is wr…