By Joseph Campbell and Alessandra Prentice ZAPORIZHZHIA/MARIUPOL, Ukraine (Reuters) -Dozens of evacuees who took refuge for weeks in the bunkers of a steel works in Russian-occupied Mariupol reached the safety of Kyiv-controlled Zaporizhzhia on Tuesday, but aid workers said many still remained trapped in the port city. Exhausted-looking people, including young children and pensioners laden with bags, clambered off buses that pulled into a car park in southeastern Ukraine after escaping the ruins of their hometown where Russia now claims control. “We had said goodbye to life, we didn’t think an…