David Beckham has sued Mark Wahlberg over a fitness brand deal that allegedly cost the English soccer star over $10 million, RadarOnline.com has learned. Beckham’s DB Ventures Ltd company claimed that the actor “duped” him into working with F45 Training, an Australian gym franchiser that Wahlberg bought a minority stake in in 2019 and now serves as chief brand officer for. Beckham befriended Wahlberg after moving to Beverly Hills to play for the LA Galaxy team in 2007. In 2020, he agreed to become F45’s global ambassador, promoting the brand to his millions of Instagram followers in posts that…