transformers

2322eb8e - Update serving signatures and make sure we actually use them (#19034)

Update serving signatures and make sure we actually use them (#19034) * Override save() to use the serving signature as the default * Replace int32 with int64 in all our serving signatures * Remember one very important line so as not to break every test at once * Dtype fix for TFLED * dtype fix for shift_tokens_right in general * Dtype fixes in mBART and RAG * Fix dtypes for test_unpack_inputs * More dtype fixes * Yet more mBART + RAG dtype fixes * Yet more mBART + RAG dtype fixes * Add a check that the model actually has a serving method