Core: store multidata/multisave enums by value on py3.11 #1783
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What is this fixing or adding?
Python 3.11 changed to pickle/store enums by name rather than by value. This breaks our safe unpickle, it produces bigger pickles and it makes it impossible to rename keys in enums after the fact.
Changing it back to ByValue produces the same output as py<=3.10.
Change in python is here: python/cpython#26658
How was this tested?