I am of two minds here, regardless of the "closeness" there is a whole field of comedy that does impressions of others. That is what is so difficult about the AI discussion. Clearly, there are plenty of humans who can mimic other humans visually, in prose for writing, in voice and mannerisms etc.

Leaving the IP issue aside, they could clearly have hired a voice actor to closely resemble Johansson maybe without additional tweaks to the voice in post processing. If they did do that, I am not totally sure what position to take on the matter