Add LlamaForSequenceClassification (#22209)
* Add LlamaForSequenceClassification
* Update src/transformers/models/llama/modeling_llama.py
Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>
* Update src/transformers/models/llama/modeling_llama.py
Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>
* Add docstring
* Add test
* Add input embedding getter and setter
* Remove dead code
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Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>
