Add sequence classification support for small Gemma 3 text models (#40562)
* add seq class for gemma3 text model
* add Gemma3TextForSequenceClassification to modeling file
* After run make fixup
* let's just check
* thiis is why it was crashing, tests were just failing...
* skip it, tested only for seq clf
---------
Co-authored-by: Raushan Turganbay <raushan@huggingface.co>