Fix findfeatures matrix inversion issues and improve FastGeom performance (#4772)

* findfeatures bug fixes and improvements

* Fix matrix inversion error on empty matrix. (Fixes #4639)
* Identify images that fail FastGeom transform and exclude from matching.
* Add TONOGEOM parameter to write failed file loads or FastGeom error file list if the transform cannot be determined
* Improve FastGeom transform algorithm using new radial point mapping scheme
* Add more debugging output to help diagnose problem images/procedures

* findfeatures - add Grid algorithm to FastGeom

* findfeatures mod to add Grid algorithm to FastGeom class
* Improved Grid algorithm by computing proper starting iteration to statisfy fastgeompoints request
* Added additional parameterization of Grid algorithm
* Reorganized mapping process to consolidate Radial and Grid algorithms in FastGeom

* findfeatures modifications after Astro code review

findfeatures modifications:

* Refactored FastGeom separating large sections of the compute() methods
* Redesigned the the radial algorithm for easier user configuration
* Added sanity checks avoid bad geometric correspondences
* Added GLOBALS parameters for easy configuration of FastGeom algorithms at runtime

* Fixed existing findfeatures test - error text

The ThreeImageNetwork.FunctionalTestFindfeaturesErrorNoInput expects an error to be thrown with spectific text. The text in findfeatures.cpp was changed in this PR. It fixes the existing findfeatures test suite.

* FastGeom.cpp updated to better accomodate testing

* Add findfeatures Radial/Grid config files for test

* Updated findfeatures test for Grid/Radial algos

* Fixed cnetwinnow test that created misplaced files

The cnetwinnow test needs tempDir().path() prepended to the “file_prefix” parameter to properly place the output files in the teardown directory.

* Small adjustment to new findfeatures tests

* Fixes/improvements to findfeature code

- Improved reporting of parameterizations of findfeatures
- Prevent creation of empty TONOTMATCH file when none are detected

* Significant modifications/improvements to docs

 - Added two new examples demonstrating/documenting the use of FASTGEOM algorithm, parameterization using GLOBALS and how to produce a regional mosaic using findfeatures with batch scripts.
- Reviewed, clarified and improved findfeatures program documentation

* Updated the change log

* Updates to findfeatures PR #4772

- Modified findfeatures.xml documentation to address PR review feedback
- Fixed use of projected images which wasn’t working due to improper instantiation of the cube projection object
- Updated CHANGELOG.md to better categorize all changes in this PR

* Removed scripts in example 4 of findfeatures docs

- Per request via USGS review, removed the Bash shell scripts that produce the results of example 4

- Removed the $ISISROOT/appdata/templates/findfeatures/mosaics containing the scripts

- Updated documentation in findfeatures.xml accordingly

- Updated CHANGELOG.md accordingly