The billion-dollar arena complex the Clippers want to build in Inglewood took another step forward Friday with the release of the draft environmental report for the project. The report found that the privately financed Inglewood Basketball and Entertainment Center might create a “large number of significant and unavoidable transportation impacts,” but would add almost 1,000 full-time non-construction jobs in the city, won’t contribute to gentrification or impact the viability of competing arenas in the region.