Use of torch.inference_mode() instead of torch.no_grad() for inference

[thomastschinkel]

Replaced the torch.no_grad() context manager with the torch.inference_mode() context manager in the test function.

Why? torch.inference_mode() is more efficient as it reduces memory usage, inference speed and it disabled autograd completely.

Tested with run_python_examples.sh locally, all tests passed succesfully.

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