No, there's absolutely no reason for Tesla to report selling you a car to the IRS. They don't report that for any other cash/USD buyers. They didn't pay you anything (i.e. "nonemployee compensation") so there's no reason to send you a 1099. They simply gave you a car for an agreed upon amount of BTC. Now Tesla has to convert that to USD (or more likely, just keep it in their BTC wallet). So there are absolutely no transactions here that would trigger any reporting to the IRS. Of course, Tesla would include the value of the BTC transaction in USD in their financial statements, earnings, and tax returns, but at that point, you are out of the picture.
OTOH, if you convert BTC to USD in an exchange like Coinbase, that would be reported to the IRS, and it would be up to you to pay taxes on any gain that transaction entailed. Now I would suppose it's possible for an exchange like Coinbase to report all like-kind BTC transfers to the IRS (I'm not sure they do that), but if you hold your BTC in your own wallet and not an exchange (and therefor do not have to convert to USD first), and you just xfer BTC to Tesla, that transaction is anonymous and also not reported to the IRS.