transformers

a5ca56ff - Supporting seq2seq models for `bitsandbytes` integration (#18579)

Supporting seq2seq models for `bitsandbytes` integration (#18579) * Supporting seq2seq models for `bitsandbytes` integration - `bitsandbytes` integration supports now seq2seq models - check if a model has tied weights as an additional check * small modification - tie the weights before looking at tied weights!