* Stock index rises 30.12 points, or 0.24 pct, to 12,830.03 * Energy stocks lead the way, financials also strong * Consumer staples weak By Cameron French TORONTO, March 15 (Reuters) - Canada's main stock index ended higher on Friday on the back of surging energy stocks and a slight gain in financials, but the market just missed notching its fourth-straight weekly gain due to steep losses earlier in the week. The upward momentum was largely due to the 1.09 percent rise in t