Tesla seems to be setting the stage for Gigafactory Shanghai to increase its Model Y output. As per recent reports from China, Tesla is shutting down its electric vehicle factory in early July to make way for upgrades to the Model Y line. With the upgrades in place, Gigafactory Shanghai’s Model Y output will reportedly be boosted to about 2,000 units per day. Overall, the improvements to Giga Shanghai’s Model Y production should put the factory’s weekly output closer to about 22,000 units per week. Interestingly enough, an image of a memo from Tesla China seemed to indicate that Giga…