Added GGML Type 3 dequantization capability in transformers

[kskd1804]

What does this PR do?

This PR introduces the dequantize_q4_1 function which allows users to load Q4_1 quantization models using transformers.

Fixes # (issue)
#31847

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@SunMarc

[amyeroberts]

Gentle ping @SunMarc

[SunMarc]

Thanks for adding this @kskd1804 ! Going forward, I think it will be better if we use the dequantize function introduced in gguf package. This PR should unlock your feature ! Thanks again for contributing.

[SunMarc]

The dequantize function PR has been merged !