When WITH_CYCLES_DEBUG is set to ON the following errors are
printed to the console:
E0412 15:51:22.588564 7996345 sync.cpp:737] Unknown pass Guiding Color
E0412 15:51:22.588605 7996345 sync.cpp:737] Unknown pass Guiding Probability
E0412 15:51:22.588613 7996345 sync.cpp:737] Unknown pass Guiding Average Roughness
This change fixes this by treating the guiding passes the same
way as all other passes, solving the errors and making it possible
to visualize guiding passes in the viewport later on.
Pull Request: https://projects.blender.org/blender/blender/pulls/106863
e5d50b1787