Use aces_interchange role in OpenColorIO to identify the correct colorspace
for each config. Also use acesImageContainerFlag attribute from the ACES
container format to identify the colorspace.
Write ACES2065-1 chromaticities in EXR files when appropriate. This gets us
closer to supporting output of the ACES container format, though we don't
write acesImageContainerFlag. There are various restrictions that must be met
which are not very practical, and even exr2aces doesn't write it.
Pull Request: https://projects.blender.org/blender/blender/pulls/135823
f5c3b8be5c