Chrysler: carstate returns capnp struct directly (#1110)

* Before abstraction, adding speed init from VW as well

* strting to abstract carstate class

* fix bug and update lock?

* revert pipfile change

* another bug

* fix linter

* bug fix

* remove a bunch of diplicated kf code

* better to not have class vars. will abstract __init__ anyway later

* abstract common instance vars in carstate init and a generic gear parser static method

* abstract gear parser for chrysler

* abstract gm gear parser too

* remove unnecessary random vars

* Chrysler: carstate returns capnp struct directly

* revert ref commit

* test ref

* ops, missed this conflict

* not sure why this got deleted

* no need to copy

* remove copy import

Co-authored-by: Willem Melching <willem.melching@gmail.com>

old-commit-hash: 703eb511da

selfdrive/test/process_replay/ref_commit

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