By Greg Bishop Before Messi and Mbappe and the lavish hotel shaped like crossed swords, there were waves and waves of migrant workers. As the World Cup is settled, remember their story. In a city that barely existed 10 years ago, towers now compete for size and scope. To be the most lavish, the most expensive, the tallest. They loom, like a forest of steel, curves and ambition. They peer down on fountains and promenades and parks and malls and marinas and hotels, one shaped like a pair of curved swords; everything new, marble, imported. They’re best viewed at night, when they gleam and sparkle…