Jem Aswad Senior Music EditorAs Adele’s massive concerts in London’s Hyde Park next week approach, workers at the Colosseum at Caesars Palace — where she abruptly postponed her Las Vegas residency on Jan. 20, just a day before it was set to begin — were told this week that they will be laid off for the summer, according to a report in the Las Vegas Review Journal.The move, which will see 11 full-time employees furloughed from the end of Morrissey’s residency on July 9 through preparations for Rod Stewart’s run beginning on Sept.