Fix reproducibility issue with GPU

[HendricksJudy]

Fixes #752

Add deterministic resizing method to ResizeLongestSide class and update relevant scripts and notebooks.

• Add apply_image_deterministic method to ResizeLongestSide class in segment_anything/utils/transforms.py to ensure deterministic resizing using torch.nn.functional.interpolate with mode='nearest'.
• Update notebooks/onnx_model_example.ipynb to use apply_image_deterministic method for resizing images and add a note about the non-reproducibility issue with GPU and potential workaround using CPU.
• Update scripts/amg.py to use apply_image_deterministic method for resizing images.
• Add a note in README.md about the non-reproducibility issue with GPU and potential workaround using CPU.

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