By Jacob Gronholt-Pedersen COPENHAGEN (Reuters) – Two top European shippers warned on Wednesday freight costs were likely to remain high well into this year, offering no relief to customers including the world’s biggest retailers, though they said bottlenecks should ease later in the year. Pandemic-related disruption and a surge in consumer demand drove up prices for shipping goods around the world last year, boosting profits for both container shipping group Maersk and freight forwarder DSV. “Freight rates remain very high, volumes are strong and lots of shipping capacity is still tied up out…