Add test for vf_ground_sky_2d view factor bounds#2690

Chirag3841 wants to merge 2 commits intopvlib:mainpvlib/pvlib-python:mainfrom

Chirag3841:fix-vf-ground-sky-wedge-cleanChirag3841/pvlib-python:fix-vf-ground-sky-wedge-cleanCopy head branch name to clipboard