🐛 [Bug] `aten.mean.dim` converter throws error despite being supported

[gs-olive]

Bug Description

The aten.mean.dim converter throws the following error when compiling the displayed model:

##### MODEL:
class Sample(torch.nn.Module):
    def __init__(self):
        super(Sample, self).__init__()

    def forward(self, x):
        return torch.mean(x, dim=1)

##### ERROR:
  File "~/TensorRT/py/torch_tensorrt/fx/fx2trt.py", line 328, in call_function
    return converter(self.network, target, args, kwargs, self._cur_node_name)
  File "~/TensorRT/py/torch_tensorrt/fx/converters/aten_ops_converters.py", line 57, in aten_ops_adaptive_avg_poolnd
    raise RuntimeError(f"We do not support {target} has dim={args[1]}")
RuntimeError: We do not support aten.mean.dim has dim=[1]

To Reproduce

Steps to reproduce the behavior:

1. Initialize model as above: Sample().eval().cuda()
2. Initialize oneinput tensors, for example: torch.zeros((5, 5), dtype=torch.float, device="cuda:0")
3. Compile the model using FX: torch_tensorrt.fx.compile(model, [input_], min_acc_module_size=1, is_aten=True)

Expected behavior

Model should compile via the FX path or list the operator as unsupported.

Environment

• Transformers: 4.26.1
• Torch-TensorRT Version (e.g. 1.0.0): fce0a01
• PyTorch Version (e.g. 1.0): 2.1.0.dev20230313+cu117
• CPU Architecture: Intel Xeon CPU
• OS: Ubuntu 20.04
• How you installed PyTorch: pip
• Build command you used: python setup.py develop
• Are you using local sources or building from archives: local
• Python version: 3.8.13
• CUDA version: 11.7

Additional Context

Solving this issue will also resolve the error encountered in #1740

[gs-olive]

Addressed by #1657, but seeing the following error message when using that PR:

Error Message

Got 1 acc subgraphs and 0 non-acc subgraphs
Traceback (most recent call last):
  File "case_test.py", line 22, in <module>
    main()
  File "case_test.py", line 19, in main
    trt_model = torch_tensorrt.fx.compile(model, [input_], min_acc_module_size=1, is_aten=True)
  File "~/TensorRT/py/torch_tensorrt/fx/lower.py", line 86, in compile
    return lowerer(module, input)
  File "~/TensorRT/py/torch_tensorrt/fx/lower.py", line 316, in __call__
    return do_lower(module, inputs)
  File "~/TensorRT/py/torch_tensorrt/fx/passes/pass_utils.py", line 118, in pass_with_validation
    processed_module = pass_(module, input, *args, **kwargs)
  File "~/TensorRT/py/torch_tensorrt/fx/lower.py", line 313, in do_lower
    lower_result = pm(module)
  File "/usr/local/lib/python3.8/dist-packages/torch/fx/passes/pass_manager.py", line 246, in __call__
    out = _pass(out)
  File "/usr/local/lib/python3.8/dist-packages/torch/fx/passes/pass_manager.py", line 246, in __call__
    out = _pass(out)
  File "~/TensorRT/py/torch_tensorrt/fx/passes/lower_pass_manager_builder.py", line 202, in lower_func
    lowered_module = self._lower_func(
  File "~/TensorRT/py/torch_tensorrt/fx/lower.py", line 178, in lower_pass
    interp_res: TRTInterpreterResult = interpreter(mod, input, module_name)
  File "~/TensorRT/py/torch_tensorrt/fx/lower.py", line 130, in __call__
    interp_result: TRTInterpreterResult = interpreter.run(
  File "~/TensorRT/py/torch_tensorrt/fx/fx2trt.py", line 204, in run
    super().run()
  File "/usr/local/lib/python3.8/dist-packages/torch/fx/interpreter.py", line 137, in run
    self.env[node] = self.run_node(node)
  File "~/TensorRT/py/torch_tensorrt/fx/fx2trt.py", line 275, in run_node
    trt_node = super().run_node(n)
  File "/usr/local/lib/python3.8/dist-packages/torch/fx/interpreter.py", line 179, in run_node
    return getattr(self, n.op)(n.target, args, kwargs)
  File "~/TensorRT/py/torch_tensorrt/fx/fx2trt.py", line 328, in call_function
    return converter(self.network, target, args, kwargs, self._cur_node_name)
  File "~/TensorRT/py/torch_tensorrt/fx/converters/fx2trt_ops_converter.py", line 81, in convert_avg_pool
    input_trt = add_missing_trt_tensors(network, [input])[0]
  File "~/TensorRT/py/torch_tensorrt/fx/converters/fx2trt_ops_converter_utils.py", line 19, in add_missing_trt_tensors
    dtype = check_torch_dtype(*tensors)
  File "~/TensorRT/py/torch_tensorrt/fx/converters/fx2trt_ops_converter_utils.py", line 88, in check_torch_dtype
    assert (
AssertionError: While executing %mean_dim : [#users=1] = call_function[target=torch.ops.aten.mean.dim](args = (%arg0, [1]), kwargs = {_itensor_to_tensor_meta: {<tensorrt.tensorrt.ITensor object at 0x7f48305059f0>: None}})
Original traceback:
  File "case_test.py", line 13, in forward
    return torch.mean(x, dim=1)