Updates Bundle Observation Vector to support Csm observations. (#4457)

* Remove duplicated member variables and accesor functions from BundleObservation and add Csm camera type to Camera enum

* Remove commented-out code

* Imagecoeff migrated into BundleObservation class working

* Get base level working for all coeffs in ISIS

* Fix accidental move into if statement to get tests passing again

* Updated RHS for CsmBundleObservation to work

* Adds point3D support to CSM Camera observations and also adds ground Partials member function to CSMCamera

* Draft of sensor partials code

* Add docs, some fixes based on review requests

* move computation of weights and observation values to bundle observations

* Add observationvalue function to CsmBundleObservation and move the weighting that it is possible to to the observation classes

* Make CSMSolveSet an optional parameter to get jigsaw tests passing again

* cleanup

* Move observation weights into MLE if block

* Added isis vs. csm support to Bundle Observation Vector class to allow jigsaw to proceed past the setup stage for csm networks

* Comment cleanup

* Fix failing unit tests

* Add docs

* Updated based on feedback with potentially temporary fix to get unit tests passing

* Update tests a bit

* Aligned signature definitions and cleaned up

* remove unneeded functions

* More comment cleanup

Co-authored-by: Kristin Berry <kberry@gyro.wr.usgs.gov>