BOSTON — Evictions, which have mostly been on pause during the pandemic, were expected to ramp up Monday after the Biden administration allowed the federal moratorium to expire over the weekend and Congress was unable to do anything to extend it.Housing advocates fear the end of the Centers for Disease Control and Prevention moratorium could result in millions of people being evicted. But most expect the wave of evictions to build slowly over the coming weeks and months as the bureaucracy of removing people from …