Re-add and refactor lrowacphomap (#4961)

* Add radiance units label in lrowaccal output cube

* Revert "Add radiance units label in lrowaccal output cube"

* Add refactored lrowacphomap app

* Add lrowacphomap functional tests and test data

* Add entry to CHANGELOG.md for the re-addition and refactoring of lrowacphomap

* Change ShapeModel keyword in Kernels group of lrowacphomap test cube label to relative path

* Add new test cube corresponding to the lrowacphomap test input cube's updated ShapeModel value

* Update expected stats result values for the LrowacphomapNoBack functional test

Co-authored-by: Victor Silva <victor.silva@asu.edu>