UNITED NATIONS, Jan 3 (Reuters) - The United Nations Security Council is due to meet on Monday after the U.S. attacked Venezuela and deposed its long-serving autocratic President Nicolas Maduro, a move that U.N. Secretary-General Antonio Guterres views as setting "a dangerous precedent."Colombia, backed by Russia and China, requested the meeting of the 15-member council, diplomats said. The U.N. Security Council has met twice - in October and December - over the escalating tensions between the United States and Venezuela.U.S. President Donald Trump said on Saturday that Washington would run Venezuela "until such time as we can do a safe,...