By Charlie Conchie An Irish tech ‘unicorn’ has ruled out a potential London IPO after a bitter spat with FTSE 100 private equity giant Intermediate Capital Group (ICG), which holds a ten per cent stake in the firm, City A.M. has learned. Workhuman, a Dublin-based software company valued at $1.2bn in 2020, has been embroiled in a dispute with ICG since March last year when the investor allegedly blocked an acquisition at the eleventh hour and tried to boost its own influence over the firm. The two companies have been locked in court battles in London and Dublin as ICG attempts to prevent Workhu…