Nezha Pytorch implementation (#17776)

* wip

* rebase

* all tests pass

* rebase

* ready for PR

* address comments

* fix styles

* add require_torch to pipeline test

* remove remote image to improve CI consistency

* address comments; fix tf/flax tests

* address comments; fix tf/flax tests

* fix tests; add alias

* repo consistency tests

* Update src/transformers/pipelines/visual_question_answering.py

Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>

* address comments

* Update src/transformers/pipelines/visual_question_answering.py

Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>

* merge

* wip

* wip

* wip

* most basic tests passes

* all tests pass now

* relative embedding

* wip

* running make fixup

* remove bert changes

* fix doc

* fix doc

* fix issues

* fix doc

* address comments

* fix CI

* remove redundant copied from

* address comments

* fix broken test

Co-authored-by: Sijun He <sijunhe@Sijuns-MacBook-Pro.local>
Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>

docs/source/en/_toctree.yml

@@ -306,6 +306,8 @@
       title: MPNet
     - local: model_doc/mt5
       title: MT5
+    - local: model_doc/nezha
+      title: NEZHA
     - local: model_doc/nystromformer
       title: Nyströmformer
     - local: model_doc/openai-gpt