Use approximate float comparison library for PointXYZIFR type in ray ground classifier
Description
Replace a non-library approximate comparison with a library comparison operator in operator<(PointXYZIFR, PointXYZIFR)
Expected behavior
No functional change, just a refactor.
Definition of Done
-
operator<(PointXYZIFR, PointXYZIFR)
uses the library comparison operator