Fix load_from_checkpoint to apply original model's hparams

[sungchul2]

Summary

When testing the model with the parameters different from one used during training, they haven't been appropriately applied.
Check infer_reference_info_root in the below example. The default value of infer_reference_info_root is ../.latest/train and I want to update it to another path.
The order is:

• original model set for test
• previously created model by load_from_checkpoint(...)
• updated one by load_from_checkpoint(..., **model.hparams)

How to test

Checklist

• I have added unit tests to cover my changes.​
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• I have linked related issues.

License

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  Feel free to contact the maintainers if that's a concern.
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# Copyright (C) 2024 Intel Corporation
# SPDX-License-Identifier: Apache-2.0