Olympic great Mo Farah expressed relief Wednesday after receiving fulsome backing from the UK government despite his admission that he was illegally trafficked into Britain as a child. The revelation in a new BBC documentary could have raised questions about Farah’s UK citizenship, but the interior ministry said it was taking no action. A spokesman for Prime Minister Boris Johnson said: “He is a sporting hero, he is an inspiration to people across the country. “It is a shocking reminder of the horrors that people face when they are trafficked. And we must continue to clamp down on these crimin…