fix(dynamo): stop unpacking complex inputs before the refit output check

[shoumikhin]

What is broken

Three tests are red on main:

• test_complex_buffer_refit
• test_dual_complex_buffer_refit
• test_complex_buffer_with_real_param_refit

TypeError: view_as_real is only supported for complex tensors

Why

After refitting, refit_module_weights(verify_output=True) runs the lowered
PyTorch module and the compiled module on the same inputs and compares the
results. When an input is complex it first converted that input to a real tensor
of shape (..., 2), because the lowering pass used to rewrite a complex
placeholder into a real one.

That is no longer what the pass does. The placeholder stays complex and the
graph does the unpacking itself:

placeholder      arg0_1
call_function    aten.view_as_real.default   (arg0_1,)
call_function    aten.select.int             (view_as_real, 2, 0)
...

So the reference module got a real tensor and was then asked to unpack it a
second time, which is what raises.

Fix

Give both modules the inputs the caller passed. That is what the non-complex
path already did, so the special case goes away and the two paths become one.

Tested

On an H100 with the three tests above: they fail before this change and pass
after it. The whole file passes, 7 passed and 12 skipped, the skips being the
ones main already skips in this environment.