Revert "[invoke_subgraph][fake tensor] Add finalizer on subgraph instead of the functionalize ctx wrapper (pytorch#151633)"

This reverts commit 02dd096. Reverted pytorch#151633 on behalf of https://github.com/wdvr due to reverting confusing ghstack state ([comment](pytorch#151633 (comment)))

Author: pytorchmergebot

torch/_subclasses/fake_tensor.py

@@ -1633,9 +1633,7 @@ def _prep_args_for_hash(
  # Special case for AOT Dispatcher first pass, where the fake
  # tensor is called on the functional wrapper of the subgraph.
  result.append(hash(arg))
- # functional wrapper is destroyed after fake tensor prop. We
- # need to put the finalizer on the subgraph.
- id_hashed_objects.append(arg.subgraph)
+ id_hashed_objects.append(arg)
  else:
  # It's important to capture the type of the arg since, e.g., 1 and 1.0
  # hash to the same value, but can produce different dtypes for the