Adding minimal support for CSM (#4195)

* Added Community Sensor Model as a dependency (#4130)

* Added Community Sensor Model as a dependency

* Added new keyword for CSM plugin locations

* Fixed csm entry to allow the 4th version number to float

* Csm plugin (#4142)

* Added Community Sensor Model as a dependency

* Added new keyword for CSM plugin locations

* Fixed csm entry to allow the 4th version number to float

* Load CSM plugin libraries

* Adds csminit and csmpt as prototype CSM support (#4143)

* Partial csminit code

* Update csminit to get compiling, update label based on discussion to store csm information in the Archive group, and write the state string out to the cube

* Removed Thanksgiving-themed debug output

* Updated StringBlob override methods

* Fixed some build errors

* Fixed header

* Working?

* Now working?

* First pass at csmpt application

* Better error checking

* Modified to use the plugin specification

* Addressed PR comments

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

* Update Test plugin and model to get partway to using a second sensor model

* Adds tests for csminit (#4151)

* Update Test plugin and model to get partway to using a second sensor model

* Add tests for csminit

* Fixed stream buffer flushing issue to fix json file issues

* Fix issue with reading/writing blobs to test cube and general cleanup and documentation

* Update PR based on comments

* Remove full path

* Update based on feedback

* modified csminit to put model info in a separate group (#4171)

* Added test model parameters

* Added geometric model stuff to alternate

* Moved csm info to new group

* Updated tests for csminit clean-up

* Changed test states to hold params

* Fixed param names and removed hardcoding

* Add documentation for testing plugin and sensosr model classes

* Added the ability to run spiceinit and csminit in any order (#4180)

* Added csminit cleanup

* spiceinit clean up

* Added no clean up test

* Added a new comment and fixed test name

* Update Test CSM Plugin to act more like a real plugin (#4187)

* Add documentation for testing plugin and sensosr model classes

* Update Test Plugin to act more like a functional plugin

* Remove comments

* Clean up

* Fix failing tests

* Update TestCsmPlugin based on feedback and add back in model construction from state based on name

* Switch to use comparison with static plugin name rather than hardcoded state

* Remove json include and unnecessary model_name from test

* Csm branch clean up (#4191)

* Removed csmpt

* General cleanup

* Review feedback

* Updated based on feedback

* Fix faulty spiceinit merge

Co-authored-by: Stuart Sides <ssides@usgs.gov>
Co-authored-by: Kristin <kberry@usgs.gov>