Gemma3 Bidirectional Attention Mask Bug

[sammysun0711]

Based on https://huggingface.co/blog/gemma3, Images cannot attend to future images but current transformers implementation will unmask attention within all images

• Issue: Attention mask for multi-image input in gemma3 transformers#38053
• PR: [gemma3] fix bidirectional attention mask transformers#38080

Need to update following code for optimum-intel openvino export after PR38080 merged:

• https://github.com/eaidova/optimum-intel/blob/2c7ddedf2c1886abcd0a9ad3ac35373bfd85d498/optimum/exporters/openvino/model_patcher.py#L4428-L4474

[sammysun0711]

Follow up fix by transformers 4.55.0.dev0: huggingface/transformers#39396