By Valerie Volcovici, Kate Abnett and Jake Spring DUBAI (Reuters) -Negotiations for a climate deal spilled into overtime at the COP28 summit in Dubai on Wednesday, as nearly 200 countries sought to bridge divisions on the future role of fossil fuels — by far the most contentious issue. Where the two-week conference lands on the issue will send a powerful message to global investors and markets about the ambition of governments around the world to end the use of oil, gas and coal, or preserve place them. Many nations had criticised a deal draft released on Monday for failing to call for a “phas…