🐛 [Bug] Remove prepare_inputs and passing inputs during compilation.

Bug Description

Currently, we pass trt_arg_inputs and trt_kwarg_inputs to compile_module https://github.com/pytorch/TensorRT/blob/main/py/torch_tensorrt/dynamo/_compiler.py#L682. These are actually not being used. The prepare inputs call also fails sometimes during graph parsing for dry run. Since we read all the input info from graph metadata now, we can consider removing user inputs being passed around internally.

To Reproduce

Steps to reproduce the behavior:

Expected behavior

Environment

Build information about Torch-TensorRT can be found by turning on debug messages

• Torch-TensorRT Version (e.g. 1.0.0):
• PyTorch Version (e.g. 1.0):
• CPU Architecture:
• OS (e.g., Linux):
• How you installed PyTorch (conda, pip, libtorch, source):
• Build command you used (if compiling from source):
• Are you using local sources or building from archives:
• Python version:
• CUDA version:
• GPU models and configuration:
• Any other relevant information:

Additional context

Start in py/torch_tensorrt/dynamo/_compiler.py around line 682 and trace how prepare_inputs, trt_arg_inputs, and trt_kwarg_inputs reach compile_module. Confirm that graph metadata supplies the input information, then remove the unused input passing and prepare_inputs path while preserving dry-run graph parsing. Done means compilation no longer depends on those user inputs.