By Brian Ellsworth and Jasper Ward CORAL HARBOR, The Bahamas (Reuters) – Patrol crafts manned by the Royal Bahamas Defense Force set off each day from a former luxury resort hotel, as the archipelago nation works to control a spike in migrants attempting to reach the United States on often rickety and overloaded boats. One increasingly popular hub for human smugglers is the island chain Bimini, best known for its pristine turquoise seas and wealthy tourists on yachts, less than 50 nautical miles from Florida. In January, a sole survivor was found clinging to a capsized vessel that had been car…