By William James, Kate Abnett and Valerie Volcovici SHARM EL-SHEIKH, Egypt (Reuters) – One week into this year’s U.N. climate summit in Egypt, frustrations were starting to flare as negotiators worried about resolving myriad details in time for a deal by the summit’s scheduled close on Friday. With a long list of demands for COP27, country delegates said on Sunday there had been little progress so far on the technical details of how to deliver on deals and pledges made in previous years. Those pledges include making steep cuts in climate-warming emissions within this decade and contributing to…