Cryptomatte layer initialization required the active scene to update the
image user frame, but the image user is already updated through other
mechanisms and is thus redundant to do at draw time, so we remove the
frame update call as well as the scene argument from the call chain. The
frame number of the image user is ignored at compositing time in any
case since it is set to the compositing scene frame.
This is needed for #124738.
0e7f80b262