By Abhirup Roy, Akash Sriram and Ross Kerber (Reuters) -Electric pickup and SUV maker Rivian said on Friday it was giving its CEO a pay plan worth as much as $4.6 billion over the next decade, a deal similar to Tesla's record package for CEO Elon Musk, and linked to new ​profit targets and lower share price milestones than a previous deal. The move by the Rivian board shows that the Tesla plan for Musk could become a model for companies aiming to grow ‌fast. Rivian's pay package for its CEO RJ Scaringe c ...