You might try checking the program's website. Most of the ones I looked at (when I applied last year) had info about residency application requirements. Most did not require a Step 2 score for an interview (only one program I applied to wanted one).
Just a note, you can take step 2 after your transcript is sent and select NOT to automatically retransmit your score on your MyERAs; then you can take it and not worry about your score. Some programs might ask you "by the way, have you taken/passed step 2" and you can say "yep" (if your step 1 score was solid, they probably don't care what your step 2 score is...just that you passed).