Implement JIT Enum type serialization and deserialization (#43460)
Summary:
[Re-review tips: nothing changed other than a type in python_ir.cpp to fix a windows build failure]
Adds code printing for enum type
Enhance enum type to include all contained enum names and values
Adds code parsing for enum type in deserialization
Enabled serialization/deserialization test in most TestCases. (With a few dangling issues to be addressed in later PRs to avoid this PR grows too large)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43460
Reviewed By: albanD
Differential Revision: D23284929
Pulled By: gmagogsfm
fbshipit-source-id: e3e81d6106f18b7337ac3ff5cd1eeaff854904f3
