New backplane options for SunIllumination and SurfaceObliqueDetectorResolution...

New backplane options for SunIllumination and SurfaceObliqueDetectorResolution have been added to phocube (#5488)

* Added sun illumination mask backplane.

phocube
 * Added robust implementation to determine solar illumination on body considering terrain occlusion
* Added app test for this option
* Updated documentation describing this new feature

* Add SurfaceObliqueDetectorResoluton plane

* phocube - This new plane is in addition to the existing ObliqueDetectorResolution. The difference is ObliqueDetectorResolution uses the local (shape model) emission angle and SurfaceObliqueDetectorResolution uses the emission angle calculated from the ellipsoid.

Signed-off-by: Kris J. Becker <kbecker@orex.lpl.arizona.edu>

* Added phocube options to create SUNILLUMINATIONMASK and SURFACEOBLIQUEDETECTORRESOLUTION backplanes. Added gtests for these options. Updated documentation and added an example. Addresses #5467.

* Removed unwanted phocube test Makefile, input, and truth data obtained via cherry-pick from U. of Arizona codebase. Addresses #5467.

* Minor updates to phocube app, documentation, and gtests. Addresses #5467.

* Modified .gitignore to enable upload of phocube test cube; updated CHANGELOG.md for phocube backplane additions. Addresses #5467.

* Minor documentation update and removal of unneeded include file. Addresses #5467.

* Per reviewer comments: 1) replaced cam->DetectorResolution() with cam->ObliqueDetectorResolution(false), where "false" refers to the useLocal parameter; and 2) fixed typo in phocube.xml. Addresses #5467.

* Second try on addressing reviewer comment on "cam->ObliqueDetectorResolution(false)" in phocube.cpp. Addresses

* Updated gtest FunctionalTestPhocubeSurfaceObliqueDetectorResolution. Addresses #5467.

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Signed-off-by: Kris J. Becker <kbecker@orex.lpl.arizona.edu>
Co-authored-by: Kris J. Becker <kbecker@orex.lpl.arizona.edu>