Add MVP model (#17787)

* Add MVP model

* Update README

* Remove useless module

* Update docs

* Fix bugs in tokenizer

* Remove useless test

* Remove useless module

* Update vocab

* Remove specifying

* Remove specifying

* Add #Copied ... statement

* Update paper link

* Remove useless TFMvp

* Add #Copied ... statement

* Fix style in test mvp model

* Fix some typos

* Fix properties of unset special tokens in non verbose mode

* Update paper link

* Update MVP doc

* Update MVP doc

* Fix README

* Fix typos in docs

* Update docs

docs/source/en/serialization.mdx

@@ -677,4 +677,4 @@ torch.neuron.trace(model, [token_tensor, segments_tensors])
 This change enables Neuron SDK to trace the model and optimize it to run in Inf1 instances.
 
 To learn more about AWS Neuron SDK features, tools, example tutorials and latest updates,
-please see the [AWS NeuronSDK documentation](https://awsdocs-neuron.readthedocs-hosted.com/en/latest/index.html).
+please see the [AWS NeuronSDK documentation](https://awsdocs-neuron.readthedocs-hosted.com/en/latest/index.html).