DIEPPE, France (Reuters) - French road haulage boss Bruno Beliard bet on the potential for no-deal Brexit border chaos, hiring UK-based drivers, spending cash on customs clearance training and overhauling his business model. Now he is left nursing higher costs, perhaps for nothing. Prime Minister Boris Johnson's own gamble to call a December election to "get Brexit done" has left Beliard in the dark over the rules that will govern how he carries goods between Europe and the UK. "The fact of not..