Austin Butler and Tom Hanks are an electrifying duo in Baz Luhrmann’s “Elvis,” telling The King’s story in a way that we have yet to see on screen. Before they started, however, all those expectations were eating away at Butler to the point of a near panic attack. It wasn’t until some advice from Rami Malek (a fellow portrayer of rock royalty with his turn as Freddie Mercury in “Bohemian Rhapsody”) that Butler knew it wasn’t about the perfect impression but rather about two “souls colliding…