Do NOT add Ovis2.5 model to transfromers package

[hfassold]

Please do NOT add Ovis2.5 model to official transformers package.

Otherwise, we will have the same problem as with Ovis2. Ovis2 runs with transformers 4.49, but not with transformers 4.55 as your implementation clashes with the 'official' one from the transformers team. The clash occurs because they use the same id for thr model architecture