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42a3c07a - Ensure Dynamo uses this graph's fakes for `Tensor` `example_value`s (#111954)

Ensure Dynamo uses this graph's fakes for `Tensor` `example_value`s (#111954) Summary: Fixes https://github.com/pytorch/pytorch/issues/111869, Fixes (detailed list of cases handled): https://github.com/pytorch/pytorch/pull/111913#discussion_r1370267313, fully fixes: https://github.com/pytorch/pytorch/issues/111873 Adds sanity checks ensuring that Dynamo uses this graph's fakes for Tensor `example_values` Handles the main (and only?) entrypoints for new `FakeTensor`s in a Dynamo graph: - `wrap_fx_proxy_cls` - `VariableTracker.wrap_tensor` Ensures that `get_fake_value` returns a fake except when we know we are going to properly wrap non-fakes. X-link: https://github.com/pytorch/pytorch/pull/111954 Approved by: https://github.com/ezyang Reviewed By: izaitsevfb Differential Revision: D50676041 fbshipit-source-id: 7142064c3b77da736d71db91f287df9e18579b5b