Tesla traded up because there was a risk that Elon would have a hissy fit if the vote failed, and he would single-handedly destroy the company. The fact that the risk of Elon rage-quitting was priced in demonstrates why the vote wasn't an appropriate solution in the first place, the minority shareholders are coerced to "take it or leave it" in a way that corporate law is meant to avoid.
Tesla traded up on the news that the pay package was re-approved by shareholders and the similar voting outcome (72% vs 73% originally) in light of all of this information seems to indicate that the shareholders genuinely want this to go through.