Issue #2630732 by joachim, mallezie, liam morland, joseph.olstad, quietone,...

Issue #2630732 by joachim, mallezie, liam morland, joseph.olstad, quietone, benjifisher, baltowen, heddn, ridhimaabrol24, mikran, shubham.prakash, aleevas, kishor_kolekar, Ben Buske, mikeryan, larowlan: Implement Entity::fields() for migration destinations