Pvt model (#24720)

* pull and push updates

* add docs

* fix modeling

* Add and run test

* make copies

* add task

* fix tests and fix small issues

* Checks on a Pull Request

* fix docs

* add desc pvt.md

docs/source/en/_toctree.yml

@@ -514,6 +514,8 @@
         title: NAT
       - local: model_doc/poolformer
         title: PoolFormer
+      - local: model_doc/pvt
+        title: Pyramid Vision Transformer (PVT)
       - local: model_doc/regnet
         title: RegNet
       - local: model_doc/resnet