Rosanna Arquette has jumped to Amber Heard’s defense amidst her defamation trial against ex-husband Johnny Depp. The Pulp Fiction star, 62, tweeted her support for Heard this week. Throughout her legal battle with Depp, Heard has struggled to find high-profile supporters more than her former husband. The two are embroiled in a $50 million defamation trial, with Depp …