Agencies Tesla investors on Wednesday will keep an eye on whether the electric car company maintains its ambitious 2022 delivery target as the biggest factory, Shanghai, grapples with a COVID-19 shutdown and new plants slowly ramp up output. Tesla reports quarterly results and analysts are also asking whether CEO Elon Musk will discuss his $43 billion proposal to buy Twitter and if he will use some of his Tesla shares to help fund the deal. The COVID-19 related suspension of Tesla’s Shanghai factory, the costs of ramping up new factories in Berlin and Texas and rising supply chain costs are…