Add qwen2 (#28436)

* add config, modeling, and tokenization

* add auto and init

* update readme

* update readme

* update team name

* fixup

* fixup

* update config

* update code style

* update for fixup

* update for fixup

* update for fixup

* update for testing

* update for testing

* fix bug for config and tokenization

* fix bug for bos token

* not doctest

* debug tokenizer

* not doctest

* debug tokenization

* debug init for tokenizer

* fix style

* update init

* delete if in token auto

* add tokenizer doc

* add tokenizer in init

* Update dummy_tokenizers_objects.py

* update

* update

* debug

* Update tokenization_qwen2.py

* debug

* Update convert_slow_tokenizer.py

* add copies

* add copied from and make style

* update files map

* update test

* fix style

* fix merge reading and update tests

* fix tests

* fix tests

* fix style

* debug a variable in readme

* Update src/transformers/models/qwen2/configuration_qwen2.py

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* update test and copied from

* fix style

* update qwen2 tokenization  and tests

* Update tokenization_qwen2.py

* delete the copied from after property

* fix style

* update tests

* update tests

* add copied from

* fix bugs

* update doc

* add warning for sliding window attention

* update qwen2 tokenization

* fix style

* Update src/transformers/models/qwen2/modeling_qwen2.py

Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* fix tokenizer fast

---------

Co-authored-by: Ren Xuancheng <jklj077@users.noreply.github.com>
Co-authored-by: renxuancheng.rxc <renxuancheng.rxc@alibaba-inc.com>
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

utils/not_doctested.txt

@@ -198,6 +198,7 @@ docs/source/en/model_doc/pop2piano.md
 docs/source/en/model_doc/prophetnet.md
 docs/source/en/model_doc/pvt.md
 docs/source/en/model_doc/qdqbert.md
+docs/source/en/model_doc/qwen2.md
 docs/source/en/model_doc/rag.md
 docs/source/en/model_doc/realm.md
 docs/source/en/model_doc/reformer.md
@@ -745,6 +746,10 @@ src/transformers/models/pvt/image_processing_pvt.py
 src/transformers/models/pvt/modeling_pvt.py
 src/transformers/models/qdqbert/configuration_qdqbert.py
 src/transformers/models/qdqbert/modeling_qdqbert.py
+src/transformers/models/qwen2/configuration_qwen2.py
+src/transformers/models/qwen2/modeling_qwen2.py
+src/transformers/models/qwen2/tokenization_qwen2.py
+src/transformers/models/qwen2/tokenization_qwen2_fast.py
 src/transformers/models/rag/configuration_rag.py
 src/transformers/models/rag/modeling_rag.py
 src/transformers/models/rag/modeling_tf_rag.py