reuters.com By Khanh Vu and Francesco Guarascio June 5, 2023 - 4:33 PM GMT+7 FILE PHOTO: Samsung centre building is seen in Hanoi Vietnam May 29, 2023. REUTERS/Francesco Guarascio HANOI, June 5 (Reuters) - Vietnam's rolling power cuts have hit industrial parks in the country's northern provinces where top global manufacturers such as Foxconn and Samsung have…