* EKF: Add sympy derivation of equations for EKF-GSF yaw estimator
* EKF: Convert EKF-GSF yaw estimator to use sympy generated equations
* EKF: Add status prints for GSF-EKF yaw estimator cvode gen
* EKF: Move generated code for GSF-EKF yaw estinmator to generated directory
* Make it run with python3
* Cleanup yaw estimator code generation
* Improve and simplify gsf measurement update code generation
* Use improved auto generated measurement update code
& remove obsolete updateInnovCovMatInv function
* Delete generated ekf_derivation for the moment
Co-authored-by: kamilritz <kritz@ethz.ch>