Celtic goalkeeper Joe Hart is on the verge of retirement as he nears his last professional match this weekend in the Scottish Cup final. The Bhoys have already secured Scottish Premiership title success, with Hart leading the celebrations at full-time after their victory over St Mirren. Lifting the trophy alongside Callum McGregor, the former England international has symbolized the winning mentality Celtic built up under Ange Postecoglou and now Brendan Rodgers, who will be determined to end the season as a domestic double holder. From a personal standpoint, Saturday will be Hart’s 153rd and …