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fa981418 - Make dict_keys_getitem tracable. (#166776)

Make dict_keys_getitem tracable. (#166776) Summary: dict_keys_getitem can show up in the bytecode but it's using dict.keys() which is not fx tracable. fx.wrap should make it as a standalone function in the graph to be invoked later with real inputs. X-link: https://github.com/pytorch/pytorch/pull/166776 Approved by: https://github.com/jamesjwu ghstack dependencies: #166775 Reviewed By: donigian Differential Revision: D86135714 fbshipit-source-id: be440f6f7723b74f805c60b86904ad2417dddc52