By Matthew Cooper Christian Horner has insisted he will “absolutely” be Red Bull Racing’s team principal and CEO at the Saudi Arabian Grand Prix next week, having been cleared of any wrongdoing by the team’s parent company. Horner was accused of “inappropriate behaviour” by a female colleague, but an internal investigation dismissed the allegations earlier this week. However, alleged text messages and photos \- which have been seen by Mirror Sport \- between Horner and the colleague were leaked the following day. And in the face of mounting pressure over his future, the 50-year-old sent a poin…