💾 ciflow/trunk/182326: Update on "Add tearDown checks for torch function state leaks"

Summary: Two dynamo codegen bugs cause tests in TestTorchFunctionMode to leak global
torch function state, silently poisoning later tests in the same process:


test_factory_override leaks a TorchFunctionMode onto the C mode stack
when a with TorchFunctionMode() spans a __build_class__ graph break.
Filed as #182317.


test_disable_enable_subclass...