The defamation trial initiated by Senator Linda Reynolds against Brittany Higgins has wrapped up. (Mick Tsikas/AAP PHOTOS) Prime ministers, TV hosts, journalists, MPs and staffers were among the who’s who of mentions and witnesses in the Linda Reynolds defamation trial, reports ARRON BUNCH from Perth. What started as a defamation case between a senator and an alleged sexual assault victim ballooned into a who’s who of Australian politics and med…