By Karolina Tagaris and Renee Maltezou ATHENS (Reuters) – After years in which Greece was almost as well known for its financial woes as it was for its beaches, recent deals have highlighted a small but thriving startup scene that has grown up since the crisis. JP Morgan’s acquisition of a minority stake in fintech Viva Wallet last month valued the payments company at over $2 billion, giving Greece its first tech “unicorn” after a steady buildup of the sector over the past seven years. That deal is expected to be followed up this month by Facebook owner Meta’s acquisition of Accusonus, a start…