By Amruta Khandekar and Shristi Achar A (Reuters) -Wall Street was set to open higher on Wednesday as investors were optimistic about rate cuts from the Federal Reserve early next year, after data showed further signs of a cooling labor market. The S&P 500 and the Dow closed lower in the previous session, but the tech-heavy Nasdaq was propped up by a fall in Treasury yields after data showing a fall in job openings bolstered bets that the Fed was done raising rates. Providing more evidence of labor market weakness, the ADP National Employment report showed private payrolls increased by 103,000…