Fixes up seatbelt, door open, gear shift, and adds fingerprint for a 2021 macan turbo

[dparring]

fixing up some signals. let me know if you want a different approach anywhere, especially around the added DBC and gear shift parsing

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[dparring]

Working off of the draft MLB PR, I think this will address the following open items (at least for Macan):

Solve issue with door-open signals
Solve issue with gearshift position signals

commaai#27586