Nick Vivarelli International CorrespondentRupert Everett and Malcom McDowell have joined the cast of Amazon heist series “Everybody Loves Diamonds,” being produced as an original in Italy, where the streamer on Tuesday also revealed a slew of unscripted local shows now on its Italian slate.Amazon’s previously announced high-end show follows a group of thieves led by Sicilian mastermind Leonardo Notarbartolo — being played by Italy’s Kim Rossi Stewart — who in 2003 managed to circumvent the advanced security system of the Antwerp Diamond Center and steal precious stones worth more than $100 million. Everett and McDowell play secondary roles that will add international heft to the high-end skein produced by Fremantle-owned Wildside that will drop globally in 2023.