[Python] Support meta share for type forward/backward compatibility #2160
Description
Feature Request
Meta share is used for support type forward/backward compatibility. Currently this is only supported in native java/javascript serializaiton.
We should support meta share for xlang serialization format, so that when a class in java/python/... add/delete a field, the deserializers in python can still succeed
Is your feature request related to a problem? Please describe
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