Fixed incorrect model_type for qwen2vl and qwen2.5vl when config is saved and loaded again

[i3hz]

What does this PR do?

Fixes the issue where if you save the config and load it again it would return the incorrect model_type .
Minor fix in getattribute method of the config class for both models .

Fixes # 41746

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  to it if that's the case. - When Qwen2VLConfig is saved and loaded again, an incorrect model_type will be obtained #41746
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@zucchini-nlp
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[Qubitium]

@ZX-ModelCloud Please verify this.

[ZX-ModelCloud]

ISSUE#41746 Fixed in this PR.

[zucchini-nlp]

Thanks, looks good to me. Can we add a test in

transformers/tests/models/qwen2_vl/test_modeling_qwen2_vl.py

Line 191 in 4e50b84

def test_text_config(self):

, reproducing the original bug to make sure it is fixed and avoid regressions?

[i3hz]

Do I add it in the existing test_text_config function or make a new one?

[zucchini-nlp]

Let's add in existing, it's the same regression being tested

[github-actions]

[For maintainers] Suggested jobs to run (before merge)

run-slow: qwen2_5_vl, qwen2_vl

[i3hz]

I've added the required tests

[zucchini-nlp]

Thanks!

[HuggingFaceDocBuilderDev]

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