Fix: [Actions] Give Universal Mac packages the "universal" suffix #8585
Motivation / Problem
I updated the macOS release action to generate a universal build, but the .dmg still has the x86_64 suffix.
Rather than manually attempting to rename the .dmg after creation, I have added in a flag to indicate a universal build will be created.
Eventually this flag could perhaps be used to actually include the lipo step (if the path to the existing build is specified, a bit like we do with host build tools).
A user creating a universal build currently has to manually glue things together, this flag will not change that. It purely affects the naming.