ATHENS — The EU’s green light for $54 billion in fresh aid for Ukraine is as much of a sign as any that Europe has shaken off its winter torpor and is finally, in its characteristically roundabout way, getting down to business. By many accounts it was was pressure from Germany and Poland that moved the deal across the line, but it turns out that Chancellor Scholz and the Polish prime minister, Donald Tusk, were just ghosts in the Brussels gloom.