Add mean_resizing for every VLMs' resizing_token_embeddings()
Author: YenFuLin
Pull request: yes

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The function, resizing_token_embeddings(), is defined in model_utils.py, but in some VLMs overrided it and forget adding this new argument, mean_resizing, so that user cannot change mean_resizing value. However, I think this argument shall be flexible to VLMs so that I refine it.

Fixes #35357


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