By Ahmad Ghaddar, Alex Lawler and Rowena Edwards VIENNA/LONDON (Reuters) – OPEC+ agreed steep oil production cuts on Wednesday, curbing supply in an already tight market, causing one of its biggest clashes with the West as the U.S. administration called the surprise decision shortsighted. OPEC’s de-facto leader Saudi Arabia said the cut of 2 million barrels per day (bpd) of output – equal to 2% of global supply – was necessary to respond to rising interest rates in the West and a weaker global economy. The kingdom rebuffed criticism it was colluding with Russia, which is included in the OPEC+ …